<html><body><h2 style="margin-left:-18pt;text-align:justify;">1. What is capacity in performance test? </h2>Capacity in performance testing refers to the ability of a system to handle a specific workload or user traffic volume while maintaining acceptable performance levels. In other words, it is the maximum amount of load or traffic a system can handle without any performance issues such as slow response times, high error rates, or system crashes. Capacity testing involves simulating a high volume of user traffic on the system to identify bottlenecks and performance issues, and to determine the maximum amount of load the system can handle.<h2 style="margin-left:-18pt;text-align:justify;">2. Why is capacity measurement important in performance test?</h2><ul><li>First, Capacity measurement can help ensure that an application can handle the expected number of users or data without experiencing any performance issues.</li><li>Second, the Capacity measurement helps to identify the bottlenecks in performance of system, and allow the performance engineers to optimize an application's performance to handle larger loads effectively. </li><li>Finally, the Capacity measurement ensures that an application is scalable for the future growth or increasing performance of the system in peak time.</li></ul><h2 style="margin-left:-13.5pt;text-align:justify;">3. How to measure capacity in performance test?</h2>By considering factors that are able to affect the capacity of a system, performance engineers can identify exactly capacity and areas to optimize the system resources. Some of critical factors of the system should be considered as:<ul><li>Hardware resources, including the CPU, memory, disk space, and network bandwidth.</li><li>Software architecture, including the number of servers, load balancers, and databases.</li><li>Expected user behavior, such as the number of users, the type of requests, and the frequency of requests</li><li>Network infrastructure, including the bandwidth, latency, and packet loss.</li><li>Testing environment, including the tools and techniques used for performance testing.</li><li>System configuration, including the settings for caching, logging, and other parameters. </li></ul> To measure the capacity of system effectively and identify potential performance issues, performance engineers can use the following strategies and work closely with developer team and stakeholders as <ul><li>Define realistic user scenarios and traffic volumes based on the system's expected usage patterns.</li><li>Choose appropriate performance testing tools that can simulate realistic user behavior and traffic volumes.</li><li>Conduct a series of tests with gradually increasing loads, starting from low loads and increasing to peak loads, to identify the system's maximum capacity.</li><li>Monitor key system metrics such as response time, throughput, CPU usage, memory usage, and network utilization during the tests.</li><li>Analyze the test results to identify performance issues such as slow response times, high error rates, or bottlenecked resources.</li><li>Use profiling tools to drill down and identify the root cause of performance issues.</li><li>Make more changes to improve capacity and performance of the system, such as optimizing code, tuning database settings, or upgrading hardware or infrastructure.</li><li>Repeat the testing process to ensure that the changes have had the desired effect on the system's capacity and performance. </li></ul> Available tools to measure capacity of the system:<ul><li>Apache JMeter is used to test the performance and capacity of web applications.</li><li>LoadRunner is a commercial tool from Micro Focus that can be used to test the performance and capacity of various types of applications, including web, mobile, and cloud applications.</li><li>Gatling is an open-source tool that can be used to test the performance and capacity of web applications.</li><li>Apache Bench is a command-line tool that can be used to test the performance and capacity of web servers.</li><li>Tsung is an open-source tool that can be used to test the performance and capacity of various types of applications, including web, SOAP, and XMPP applications.</li><li>Locust is an open-source tool that can be used to test the performance and capacity of web applications.</li></ul><h2 style="margin-left:-18pt;">4. Best practices for system capacity measurement </h2>Measuring capacity can present several challenges for performance engineers. Here are some of the most common challenges in capacity measurement:<ul><li>Limited Resources, such as time, budget, or test hardware, can make it challenging to conduct thorough capacity testing. It can be difficult to simulate real-world traffic volumes and user behavior with limited resources.</li><li>Complex Systems with multiple components, dependencies, and integration points can be difficult to test comprehensively. It can be challenging to isolate performance issues in such systems.</li><li>Changing Requirements can make it difficult to plan and execute capacity testing effectively. Unexpected changes in traffic volumes or user behavior can lead to inaccurate test results.</li><li>Lack of Test Data can make it difficult to simulate realistic user behavior and traffic volumes. Without adequate test data, it can be challenging to generate accurate test results.</li><li>Scalability Issues can arise when the system's capacity is insufficient to handle growing traffic volumes or user activity. It can be challenging to predict future capacity requirements and ensure that the system can scale to meet them.</li><li>Unreliable performance testing tools can lead to inaccurate test results and make it challenging to identify performance issues. Using the wrong tools or outdated versions of tools can also result in inaccurate test results.</li></ul> Here are some best practices that can help performance engineers measure the capacity of a system effectively:<ul><li>Defining clear objectives for capacity testing, such as determining the maximum number of users the system can handle or identifying performance bottlenecks, is important to help focus testing efforts and ensure that the testing is aligned with the goals of the project.</li><li>Using realistic test scenarios that reflect the expected usage patterns of the system will help ensure that the testing is relevant and accurate. Using production-like environments helps to ensure that the testing environment accurately reflects the production environment.</li><li>Using appropriate testing tools that can simulate realistic user behavior and traffic volumes will help ensure that the testing accurately reflects the expected usage patterns of the system.</li><li>Monitoring key system metrics during testing, such as response time, throughput, CPU usage, memory usage, and network utilization, will help identify performance issues and ensure that the testing accurately reflects the system's performance.</li><li>Conducting multiple rounds of testing with gradually increasing loads to identify the system's maximum capacity and any performance bottlenecks is essential.</li><li>Collaborating closely with development teams to identify and resolve performance issues will ensure that performance issues are resolved efficiently and effectively.</li><li>Documenting and sharing test results will ensure that everyone is aware of the system's capacity and any performance issues.</li></ul><h2 style="margin-left:-18pt;">5. Conclusion</h2>Capacity Measurement in performance test is essential to ensure that an application can handle the expected number of users or data without experiencing any performance issues. By using load testing, stress testing, and scalability testing, performance engineers can determine an application's capacity and optimize it for the expected usage. By following best practices such as defining realistic load scenarios, starting with baseline testing, monitoring key performance indicators, and using cloud-based testing, performance engineers can deliver high-performing applications that meet the needs of their users.Source: https://saigontechnology.com/blog/the-basic-concepts-of-performance-test-capacity</body></html>

Capacity is one of the most important performance factors in ISO 25010 and is a critical aspect of performance testing because it helps the organizations determine the scalability of their system and ensure that it can handle expected traffic volumes. In this article, we will discuss what capacity is in a performance test, why it is essential, and how to measure it effectively.

The Basic Concepts Of Performance Test - Capacity

<html><body><h2 style="text-align:justify;">1. What is Resource Utilization In Performance Test? </h2>Resource Utilization refers to the effective usage and allocation of various resources of the system such as CPU, memory, network bandwidth, and storage space to perform an operation. The purpose of measuring resource utilization is to identify performance bottlenecks and optimize resource usage to improve the overall performance of the application. This optimization process is critical in ensuring that performance tests yield accurate and reliable results, as well as identifying potential bottlenecks to ensure that the system can handle expected workloads.<h2 style="margin-left:-18pt;text-align:justify;">2. Why Is The Resource Utilization Important?</h2>Because of several benefits as below:<ul><li>Optimizing resource utilization can help performance of the application better by reducing the performance bottlenecks, improving the response time faster, and reducing the downtime of system resources.</li><li>Optimizing resource utilization can help reduce the number of resources required to run an application, resulting in cost savings on infrastructure, maintenance, and energy costs.</li><li>By optimizing resource utilization, an application can better handle higher user loads and scale to meet future demand without requiring additional resources.</li><li>Optimizing resource utilization can help ensure that an application is reliable and stable under varying loads, reducing the risk of crashes or system failures.</li><li>By optimizing resource utilization, an application can provide a more consistent and reliable user experience, resulting in higher user satisfaction and engagement.</li></ul><h2 style="margin-left:-13.5pt;text-align:justify;">3. How To Optimize Resource Utilization?</h2>To optimize the resource utilization, the performance engineer can apply some below strategies:<ul><li>Test Early and Often is to help detect the performance issues early on and prevent them from becoming major problems down the line.</li><li>Monitor Resource Usage during performance testing is to detect the areas of high resource consumption, optimize resource allocation and prevent over-provisioning of resources.</li><li>Use Realistic Scenarios that accurately simulate user behavior and workload patterns is to identify performance issues under real-world conditions and optimize resource utilization accordingly.</li><li>Use Virtualization Technologies to create multiple test environments on a single physical machine is to help maximize resource utilization and reduce hardware costs.</li><li>Optimize Code includes many techniques such as caching, reducing unnecessary database queries, and optimizing algorithms.</li><li>Consider Using Cloud-Based Testing Services that provide on-demand access to scalable computing resources help optimize resource utilization by dynamically allocating resources based on demand.</li></ul>In addition, performance engineers frequently monitor various factors to identify potential performance issues and optimize resource utilization:<ul><li>Workload: such as the number of concurrent users, the types of requests being made, and the volume of data being processed.</li><li>System Configuration: including hardware specifications, network bandwidth, and operating system settings.</li><li>Software Architecture: including the use of caching, load balancing, and other optimization techniques.</li><li>Environment: such as the network topology, firewalls, and other security measures.</li><li>Data Volume: including the size of the database, the number of files being processed, and the size of data being transferred over the network.</li></ul><h2 style="margin-left:-18pt;">4. Best Practices For Optimizing Resource Utilization</h2><h3 style="text-align:justify;">Common challenges of optimizing resource utilization:</h3><ul><li>Identifying the right set of resources to monitor and analyze based on the system under test and performance objectives.</li><li>Balancing the trade-off between resource utilization and system performance - optimizing one may negatively impact the other.</li><li>Dealing with intermittent performance issues or spikes in resource utilization that may be difficult to reproduce or diagnose.</li><li>Scaling up or down resources dynamically based on changing workload or system demands.</li><li>Managing the complexity of distributed systems and cloud environments, where resources may be distributed across multiple servers, containers, or instances.</li><li>Ensuring that resource utilization is consistent and repeatable across multiple test runs and environments.</li><li>Integrating resource monitoring and analysis tools with other performance testing tools and frameworks.</li></ul><h3 style="text-align:justify;">Best practices for optimizing resource utilization:</h3><ul><li>Identify resource-intensive transactions: The first step in optimizing resource utilization is to identify transactions that consume a significant amount of resources. Once these transactions are identified, developers can analyze the code and optimize it to reduce the resource consumption.</li><li>Optimize Resource Usage: Optimizing resource usage involves identifying areas where resources are being wasted or underutilized and optimizing them for better performance.</li><li>Use caching: Caching is a technique used to store frequently accessed data in memory, which reduces the load on the database and improves performance. By implementing caching, developers can optimize resource utilization and improve the overall performance of the system.</li><li>Monitor resource usage: Monitoring resource usage during performance testing is crucial to identify bottlenecks and optimize resource utilization. Developers can use tools such as monitoring software, profiling tools, and performance counters to track resource usage and identify areas that need improvement.</li><li>Conduct Regular Performance Testing: Conducting regular performance testing can help identify performance bottlenecks and inefficiencies in an application's resource usage and allow developers to optimize resource usage over time.</li><li>Use Realistic Load Scenarios: Using realistic load scenarios that reflect real-world usage can help ensure that resource utilization testing accurately reflects expected usage.</li></ul><h3 style="text-align:justify;">Available tools to measure resource utilization:</h3><ul><li>Performance Monitor: is a built-in tool in the Windows operating system that provides real-time monitoring of system resources such as CPU, memory, disk, and network usage. It can be used to collect and analyze data during performance testing.</li><li>JMeter: is an open-source tool that is widely used for performance test of the web applications. It includes built-in plugins that allow for the monitoring of system resources, including CPU usage, memory usage, and network usage.</li><li>LoadRunner: is a commercial performance testing tool that includes built-in monitoring capabilities for system resources such as CPU, memory, disk I/O, and network usage. It also includes analysis tools for identifying performance bottlenecks.</li><li>Gatling: is another open-source tool used for performance testing of web applications. It includes built-in plugins for monitoring system resources such as CPU and memory usage.</li><li>New Relic: is a cloud-based tool that provides real-time monitoring of system resources, including CPU, memory, and network usage. It can be integrated with performance testing tools to provide detailed insights into resource utilization during performance testing.</li></ul><h2 style="margin-left:-18pt;">5. Conclusion</h2>Resource utilization testing is critical for ensuring that an application can handle expected user loads efficiently and scale to meet future growth or demand. By using monitoring tools, profiling tools, and load testing, developers can measure an application's resource utilization and identify performance bottlenecks and inefficiencies. By following best practices such as identifying resource-intensive areas, optimizing resource usage, conducting regular performance testing, and using realistic load scenarios, developers can optimize an application's resource utilization and deliver high-performing applications that meet the needs of their users.Source: https://saigontechnology.com/blog/the-basic-concepts-of-performance-test-resource-utilization</body></html>

Resource Utilization is the other most important performance factor in ISO 25010. It refers to the measurement and analysis of the usage of various resources of the system efficiently. In  this article, let’s explore its significance and optimizing strategies to enhance performance of the system.

The Basic Concepts Of Performance Test - Resource Utilization

Explore the enchanting world of CSS animation, elevating web designs with captivating transitions and dynamic effects. Unleash creativity as we delve into key techniques and practices, empowering you to create immersive experiences. Join our exciting CSS animation journey!

Animation in CSS

Thanh Phamthi

Quoc Tran

A graph is a useful way to model many aspects of our daily lives. For example, we can use graphs to represent our social and professional connections, the path we take to commute, the phone network, and the flight options for our travels.

An introduction about Graph Database - Gremlin

<html><body><h2 style="text-align:justify;">1. What is ERC20?</h2>ERC20 stands for Ethereum Request for Comment 20, and it is a widely adopted standard for creating and interacting with tokens on the Ethereum blockchain. Introduced by Fabian Vogelsteller and Vitalik Buterin in 2015, ERC20 defines a set of rules and functions that tokens must follow to ensure compatibility with Ethereum's ecosystem. These standards provide a blueprint for developers, allowing them to create tokens that can be seamlessly integrated with various wallets, exchanges, and decentralized applications (DApps).In this post, we will only cover the Ethereum network and eliminate the other chain, which is a hard fork of the Go Ethereum (Geth) protocol.<h2 style="text-align:justify;">2. Features of ERC20 Tokens</h2>The contract structure of ERC20 includes six mandatory functions:<ul><li>totalSupply</li><li>balanceOf</li><li>transfer</li><li>transferFrom</li><li>approve</li><li>allowance.</li></ul>Additionally, there are optional functions such as name, symbol, and decimal.<h3 style="text-align:justify;">Deposit:</h3>ERC20 tokens are created by depositing a certain amount of Ethereum (ETH) into a smart contract. The smart contract then mints the equivalent number of ERC20 tokens, which can be traded, transferred, or stored within the Ethereum network.<h3 style="text-align:justify;">Transfer:</h3>One of the core features of ERC20 tokens is the ability to transfer them between Ethereum addresses. By calling the token's transfer function, users can send ERC20 tokens to other wallet addresses, facilitating peer-to-peer transactions.<h3 style="text-align:justify;">Divisibility:</h3>ERC20 tokens can be divided into smaller units, allowing for fractional ownership. This feature enables greater flexibility in the representation of value and promotes liquidity within the token ecosystem.<h3 style="text-align:justify;">Standardized Interface:</h3>ERC20 tokens adhere to a set of standardized functions, including totalSupply, balanceOf, transfer, and transferFrom. This uniformity ensures compatibility and enables seamless integration with wallets, exchanges, and other decentralized applications (DApps).<h3 style="text-align:justify;">Token Approval:</h3>ERC20 tokens employ an approval mechanism that enables users to grant permission for a specific address to spend their tokens on their behalf. This functionality is often utilized in decentralized exchanges and lending protocols to facilitate token trading and lending.<h3 style="text-align:justify;">Token Burning:</h3>ERC20 tokens can be burned, meaning they can be permanently removed from circulation. Token burning is typically done to reduce the total supply of tokens, increase scarcity, or improve the value proposition for token holders.All of the rules listed above is syntheticed in the openzeppelin library (https://docs.openzeppelin.com/contracts/4.x/erc20). Developers can inherit and create custom functionalities.<h2 style="text-align:justify;">3. The Distinction of ERC-20 Tokens</h2>Among the myriad of digital assets available, ERC-20 tokens have gained significant popularity due to their versatility and compatibility. Now, we will explore the distinct features of ERC-20 tokens, including wallet addresses, transaction fees, transaction times, and the high level of security they provide.<h3 style="text-align:justify;">Wallet Address:</h3>ERC-20 tokens, built on the Ethereum blockchain, utilize Ethereum addresses as their wallet addresses. These addresses consist of a unique combination of characters and digits, serving as the identifier for a specific wallet. These addresses enable users to send, receive, and store ERC-20 tokens securely. By using these addresses, individuals can easily interact with various decentralized applications (dApps) and exchanges that support ERC-20 tokens.Example of wallet address of ERC20 token: 0xC18360217D8F7Ab5e7c516566761Ea12Ce7F9D72<h3 style="text-align:justify;">Transaction Fee:</h3>Transaction fees play a vital role in the functionality of ERC-20 tokens. Similar to other cryptocurrencies, ERC-20 tokens require a small fee, known as "gas," to process transactions on the Ethereum network. Gas fees ensure that the network remains secure and incentivize miners to validate transactions. The fee amount is determined based on the complexity of the transaction and the current network congestion. While gas fees can vary, they generally remain relatively low for ERC-20 tokens, making them cost-effective for users.<h3 style="text-align:justify;">Transaction Time:</h3>The transaction time of ERC-20 tokens is dependent on the Ethereum blockchain's network congestion and the gas price offered by the user. During periods of high network activity, transaction confirmation times may increase, causing delays. However, Ethereum has been working on scaling solutions such as Ethereum 2.0, which aims to enhance the network's speed and scalability. While instantaneous transactions cannot be guaranteed, ERC-20 tokens generally offer reasonable transaction times, particularly for everyday use cases.<h3 style="text-align:justify;">High Security:</h3>The Ethereum blockchain, on which ERC-20 tokens are based, boasts a high level of security. It utilizes advanced cryptographic techniques and consensus mechanisms like proof-of-work (PoW) and proof-of-stake (PoS). This robust security framework ensures that transactions and token holdings are protected from unauthorized access, fraud, and tampering. Additionally, ERC-20 tokens benefit from the security features provided by smart contracts, which enable programmable functionality and enforce predefined rules for token transfers.Furthermore, ERC-20 tokens adhere to established token standards, ensuring interoperability and compatibility across various wallets, exchanges, and dApps. This standardization enhances security as it reduces the risk of vulnerabilities and simplifies token integration for developers<h2 style="text-align:justify;">4. Stablecoins vs. Altcoins</h2>Stablecoins and altcoins are two distinct categories of cryptocurrencies, each with its own unique characteristics.<h3 style="text-align:justify;">Stablecoins:</h3>Stablecoins are a type of cryptocurrency designed to minimize price volatility by pegging their value to a stable asset or a reserve of assets. These assets can include fiat currencies like the U.S. dollar (USD) or commodities such as gold. Stablecoins provide stability and serve as a reliable medium of exchange, making them suitable for various use cases, including remittances, e-commerce, and hedging against crypto market volatility.<img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-pR7GIcZ9nia1jeAT104y0kzKwqEGZgAjCaMWXETu.png"><h3 style="text-align:justify;">Altcoins:</h3>Altcoins, short for alternative coins, refer to cryptocurrencies other than Bitcoin (BTC). Altcoins encompass a vast array of digital assets, including Ethereum (ETH), Litecoin (LTC), Ripple (XRP), and many others. Unlike stablecoins, altcoins can exhibit significant price volatility and serve various purposes, such as utility tokens within specific ecosystems, tokens facilitating decentralized governance, or tokens supporting decentralized applications.<img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-rvw2qHxvi6PWLKCGoZgJipiHyGnldAodcFscPTm9.png"><h2 style="text-align:justify;">5. Why are Tokens Important?</h2><h3 style="text-align:justify;">Decentralized Finance (DeFi):</h3>ERC20 tokens have played a pivotal role in the rise of decentralized finance. By enabling the creation of programmable money, tokens have facilitated the development of lending platforms, decentralized exchanges, liquidity pools, and yield farming protocols. Tokens provide users with access to a wide range of financial services, eliminating the need for intermediaries and reducing barriers to entry.<h3 style="text-align:justify;">Crowdfunding and Initial Coin Offerings (ICOs):</h3>ERC20 tokens have revolutionized the fundraising landscape by introducing the concept of Initial Coin Offerings. Startups and projects can now tokenize their assets or ideas and issue tokens to investors in exchange for funds. This democratizes the investment process, allowing individuals from all over the world to participate in early-stage opportunities and share in the project's success.<h3 style="text-align:justify;">Tokenization of Assets:</h3>ERC20 tokens enable the representation of real-world assets, such as real estate, artwork, or commodities, on the blockchain. Tokenizing assets provides increased liquidity, fractional ownership, and programmable functionality. Through tokenization, individuals can access investments that were once exclusive to institutional players, thereby democratizing asset ownership.<h3 style="text-align:justify;">Interoperability:</h3>ERC20 tokens adhere to a standard interface, ensuring compatibility and interoperability across different wallets, exchanges, and smart contracts. This standardized format streamlines token integration and facilitates the creation of diverse ecosystems, fostering innovation and the development of new applications.<h3 style="text-align:justify;">Smart Contract Functionality:</h3>ERC20 tokens are programmable assets, allowing developers to implement complex logic and functionality through smart contracts. This programmability opens up a world of possibilities, enabling tokens to represent memberships, voting rights, rewards, or even govern decentralized autonomous organizations (DAOs). Such flexibility empowers developers and token holders to shape the token's behavior according to their specific needs.<img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-H4DURZ5W8fJw0MoOpYFS9FnAIULwwRXrMzFSRex0.png"><h2 style="text-align:justify;">6. Conclusion</h2>ERC20 tokens have become the backbone of tokenized economies, transforming the way we interact with digital assets, financial systems, and real-world assets. By adhering to a standardized set of rules and functions, ERC20 tokens ensure compatibility and interoperability, enabling seamless integration within the Ethereum ecosystem. Whether it's powering decentralized finance, revolutionizing crowdfunding, or tokenizing assets, ERC20 tokens have unleashed a wave of innovation, democratization, and financial inclusion. As the digital landscape continues to evolve, the importance of ERC20 tokens in shaping the future of decentralized economies cannot be overstated.In the next article, we will go through the advantages, disadvantages of ERC20 tokens, as well as how to implement them using Solidity and create an ERC20 wallet. Keep staying tuned.Source: https://careers.saigontechnology.com/blog-detail/understanding-erc20-tokens-the-backbone-of-tokenized-economies</body></html>

Blockchain technology has revolutionized various industries, decentralized systems that enable transparent, secure, and efficient transactions. In this article, we will delve into the significance of ERC20 tokens and explore why they are crucial to the rapidly evolving digital landscape.

Understanding ERC20 Tokens: The Backbone of Tokenized Economies

For those who work in software testing, everyone must have heard of API testing at least once. So how can API testing be applied to a practical project? This article will guide you in the most detailed way so that you can understand and implement it in your testing work.

How to automate API testing  like a piece of cake

Senior Developer

Trung Tran

Senior AI Engineer

Phong Le

Business Analyst

Duong Dat Thanh

Middle Developer

Nguyễn Nhật Minh

Duy Le

Long Nguyen

In the previous section (part 2), I provided an overview of how to set up a working environment using Docker containers and build a Product Service. In this section (part 3), we will shift our focus to building Customer Service using .NET, Minimal API, and PostgreSQL.

Giới thiệu tổng quan về microservice, lợi ích khi xây dựng dự án sử dụng kiến trúc microservice, các nguyên lý khi xây dựng microservice, điểm mạnh điểm yếu của microservices, đồng thời giới thiệu series thực chiến xây dựng hệ thống microservices.

Tổng quan về Microservices (Phần 1)

Cài đặt môi trường làm việc cho dự án microservices với docker, xây dựng cấu trúc ban đầu cho dự án, triển khai logging và product service, containerize cho product.service.

Thực chiến xây dựng kiến trúc dự án Microservices và triển khai Product Service (phần 2)

Build Customer service (.NET, Minimal API, and PostgreSQL)

Microservices

If you have been writing c# for a while, you must have used String (string and String can be used interchangeably because string is just an alias of String) and StringBuilder class for sure. However, underneath the simple ‘+’ operator is a huge amount of work which was designed for good intention but also could degrade performance drastically if used naively. The StringBuilder class  was crafted in order to overcome one of those problems. Do you know what these problems are and what was resolved? 
Let’s find out in this post!

How string works in c#

<html><body><h2 style="text-align:justify;">1. Cải thiện tốc độ tải trang đi cùng với  3 “Tăng”</h2><h3 style="text-align:justify;">Tăng trải nghiệm người dùng</h3>Nếu so sánh giữa sàn S và sàn L, dù sàn L có nhiều chương trình khuyến mãi hơn, nhưng khảo sát cho thấy số người sử dụng sàn S vẫn chiếm ưu thế. Lý do chính là do giao diện website của sàn S được thiết kế dễ sử dụng, tốc độ truy cập nhanh và có tính linh hoạt. Điều này cho thấy rằng việc tập trung vào trải nghiệm người dùng là rất quan trọng trong việc xây dựng một website.Hiện nay, việc trải nghiệm người dùng là một yếu tố cực kỳ quan trọng trong lĩnh vực thiết kế website. Khách hàng không muốn phải chờ đợi quá lâu để có thể xem được nội dung hoàn chỉnh của một trang web. Trong thời đại kỹ thuật số, người dùng có rất nhiều sự lựa chọn, và họ khó có thể chấp nhận trang web chậm hoặc không có trải nghiệm tốt. Do đó, tập trung vào trải nghiệm người dùng là một yếu tố quan trọng để xây dựng một trang web thành công. Nếu một trang web được thiết kế mà không tập trung vào trải nghiệm người dùng, nó sẽ khó có thể phát triển được và khách hàng sẽ không quay lại. Vì vậy, việc tập trung vào tối ưu hóa trang web để có trải nghiệm người dùng tốt là cần thiết và không thể bỏ qua. <h3 style="text-align:justify;">Tăng thứ hạng website</h3>Tốc độ tải trang chậm là một trong những nguyên nhân dẫn đến việc website của bạn có xếp hạng thấp hơn so với các trang web của đối thủ trên các công cụ tìm kiếm. Khi truy cập vào một trang web, người dùng thường không kiên nhẫn và sẵn sàng bấm nút "Quay lại trang tìm kiếm" để xem một trang web khác nếu trang web hiện tại tải quá chậm. Điều này sẽ làm cho Google đánh giá trang web này không có ích cho người dùng, dẫn đến việc xếp hạng của trang web bị giảm. Ngoài ra, tốc độ tải trang chậm cũng ảnh hưởng đến điểm số của trang web trên PageSpeed Insights, do đó việc đạt được xếp hạng cao là điều khó khăn. <h3 style="text-align:justify;">Tăng lợi ích của chủ sở hữu website</h3>Tốc độ tải trang web chậm không chỉ làm giảm trải nghiệm của người dùng mà còn ảnh hưởng đến thứ hạng của website trên các công cụ tìm kiếm. Điều này dẫn đến việc website không tương tác, kinh doanh không thuận lợi và thương hiệu ít tiếp cận được với khách hàng. Vì vậy, để đạt được hiệu quả kinh doanh tốt, việc sở hữu một website mượt mà là rất cần thiết. Có thể thấy rằng WP Rocket giải quyết hầu hết các vấn đề được đặt ra bởi PageSpeed Insights một cách dễ dàng, giúp website dễ tiếp cận với người dùng hơn. Do đó, chủ sở hữu website có thể giải quyết các vấn đề trước đó để website đạt được "3 Tăng": tăng trải nghiệm người dùng, tăng thứ hạng của website và tăng lợi ích cho chủ sở hữu website. <h2 style="text-align:justify;">2. WP Rocket là gì</h2>WP Rocket là một trong những plugin cache hiệu quả nhất cho WordPress. Không chỉ giúp tăng tốc độ trang web, WP Rocket còn giải quyết hầu hết các vấn đề được đưa ra bởi PageSpeed Insights. Việc cài đặt và cấu hình WP Rocket cũng rất đơn giản. Vì những lý do này, WP Rocket xứng đáng là một trong những plugin cache hàng đầu mà bạn nên thử sử dụng. <h2 style="text-align:justify;">3. Tính năng nổi bật của WP Rocket</h2>Sau đây mình sẽ đi qua một số tính năng mà mình đã dùng và thấy nổi bật của WP Rocket, ngoài những tính năng nổi bật này, bạn còn có thể tìm hiểu nhiều thêm nữa ở phần Tutorial của chính plugin này sau khi cài đặt, hoặc ở website chính thức của plugin này nhé!<h3 style="text-align:justify;">Cache</h3>Cache - hay còn được gọi là bộ nhớ đệm - là một khu vực lưu trữ dữ liệu tạm thời trên một thiết bị. Khi được sử dụng đúng cách, tính năng cache có thể giúp tăng tốc độ tải trang và giảm tải cho máy chủ.<ul><li>Để kích hoạt tính năng cache cho thiết bị di động hoặc người dùng đã đăng nhập vào trang web WordPress, bạn có thể chọn Enable caching for mobile devices hoặc Enable caching for logged-in WordPress users.</li><li>Ngoài ra, bạn cũng có thể thiết lập tự động xóa toàn bộ cache trang web trong một khoảng thời gian nhất định bằng cách nhập giá trị vào ô Specify time after which the global cache is cleared (0 = unlimited). Nếu bạn nhập giá trị bằng 0 thì tính năng này sẽ bị tắt.</li></ul> <img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-B0iBOyq5I5w69rVD5l3tQywRW66zURwaNVMjRURJ.png"> <h3 style="text-align:justify;">File Optimization</h3>Ở bước này, bạn có thể thoải mái kiểm thử các tính năng trong tab. Nếu website xuất hiện lỗi giao diện, chỉ cần tắt tính năng mà bạn vừa kích hoạt và xóa cache đi là mọi thứ sẽ trở về như cũ.Sau đây một số tính năng hữu ích:<ul><li>Nén file css và file js: Tính năng Minify CSS/JS files giúp tự động nén các file css và js giúp giảm thời gian tải trang.</li><li>Gộp file css và file js: Tính năng Combine CSS/JS files giúp gộp chung các file CSS/JS lại thành một. Lưu ý tính năng này không nên bật nếu trang web của bạn có hỗ trợ HTTP/2. Ngoài ra, còn có Excluded CSS/JS Files giúp người dùng có thể loại trừ được những files CSS và JS mà họ không muốn gộp khi sử dụng tính năng Combine CSS/JS files.</li><li>Trì hoãn tải tệp JavaScript: Tính năng Delay JavaScript execution giúp trì hoãn tải tệp JavaScript cho đến khi người dùng tương tác (cuộn, nhấp,...) trên trang web từ đó cải thiện hiệu suất đáng kể. Ngoài ra, còn có tùy chọn Excluded JavaScript Files để người dùng có thể chỉ định các URL hoặc từ khóa của tệp JavaScript không cần phải trì hoãn khi sử dụng tính năng Delay JavaScript execution.</li></ul><img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-gFnekDuPk9jZX6XJk6WpV7MUafo5LYKA2aCZ4zz5.png"> <h3 style="text-align:justify;">Media</h3><ul><li>Tính năng lazyload cho ảnh, iframes và video</li></ul>Tính năng Enable for images/iframes and videos giúp giảm thời gian tải trang bằng cách sử dụng lazy load cho ảnh, iframe và video.Replace YouTube iframe with preview image giúp cải thiện tốc độ tải trang đáng kể cho các trang web chứa nhiều video YouTube bằng cách thay thế khung phát trực tiếp YouTube bằng các hình ảnh xem trước. <img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-WC95jfIOIqEPVvts8sjBssTwvEHe1V8eoEl87KzQ.png"> <h3 style="text-align:justify;">Tools</h3><ul><li>Import/Export cài đặt</li></ul>Tính năng Import/Export settings giúp bạn dễ dàng sao chép cài đặt từ một trang web sang một trang khác. Điều này tiết kiệm thời gian và công sức nếu bạn cần áp dụng các cài đặt tương tự cho nhiều trang web khác nhau.<img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-9ovdESbv7qeYg4ymlGLk6KoNj81mw3C4X3LP7cxO.png"> <h3 style="text-align:justify;">Tutorials</h3>Đối với những ai đang tìm kiếm một giải pháp để tối ưu hóa trang web của mình, WP Rocket có thể là một lựa chọn tuyệt vời. Điều đặc biệt về WP Rocket là tính năng giúp tiết kiệm thời gian đáng kể trong việc tìm hiểu cách tối ưu hóa trang web. Bên cạnh đó, WP Rocket cung cấp các video hướng dẫn và demo chi tiết để người dùng có thể dễ dàng thực hiện cài đặt và tối ưu hóa trang web của mình.<img src="https://api.careers.saigontechnology.com/storage/ck-editor/CKEDITOR-hLj5Ays8zFFJrq2689J2VhapOLpdifs9A2UXdCB4.png"> <h2 style="text-align:justify;">4. Ưu nhược điểm của WP Rocket</h2><ul><li>Ưu điểm:<ul><li>Hỗ trợ tối ưu hóa website một cách nhanh chóng và hiệu quả: WP Rocket có khả năng giúp bạn khắc phục các lỗi mà PageSpeed Insights phát hiện một cách đơn giản và dễ dàng.</li><li>Sử dụng đơn giản: Bạn không cần phải là một chuyên gia về mã lệnh để có thể sử dụng plugin này.</li><li>Hỗ trợ liên kết với nhiều Add-on: WP Rocket có khả năng liên kết và hỗ trợ các Add-on khác để giúp bạn theo dõi website của mình dễ dàng hơn.</li></ul></li><li>Nhược điểm</li><li>Phí dịch vụ: WP Rocket là một dịch vụ trả phí.</li><li>Không hỗ trợ hình ảnh dạng .webp: WP Rocket không hỗ trợ tối ưu hóa hình ảnh dạng .webp.</li><li>Chỉ hỗ trợ cho website Wordpress: WP Rocket chỉ hỗ trợ cho website được xây dựng trên nền tảng Wordpress.</li></ul> <h2 style="text-align:justify;">5. Kết luận</h2>WP Rocket là một công cụ caching rất hữu ích để cải thiện tốc độ website của bạn. Nó được thiết kế để giảm thời gian tải trang bằng cách lưu trữ các phiên bản trang web đã được tạo trước đó và phục vụ chúng cho những người truy cập sau đó.Tuy nhiên, trong quá trình sử dụng WP Rocket, cần lưu ý một số điểm quan trọng để tránh lỗi và đạt được kết quả tốt nhất cho website của mình. Theo như đã ghi chú ở trên, có vài điều kiện cần phải tuân thủ:<ul><li>Cần phải cài đặt WP Rocket trên một website đã được cập nhật lên phiên bản mới nhất của Wordpress.</li><li>Nên sử dụng WP Rocket trên một website đã được cài đặt HTTPS để đảm bảo an toàn cho người dùng.</li><li>Nên sử dụng WP Rocket trên một website đã được cài đặt SSL để đảm bảo an toàn cho người dùng.</li><li>Không nên sử dụng WP Rocket trên một website đã sử dụng plugin caching khác, vì điều này có thể gây ra xung đột và làm cho website của bạn phát sinh lỗi hoặc hoạt động chậm hơn.</li></ul>Hy vọng những thông tin trên sẽ giúp bạn sử dụng WP Rocket hiệu quả hơn và cải thiện tốc độ website Wordpress của riêng mình. </body></html>

Trong thời đại số hóa hiện nay, website là công cụ quan trọng để quảng bá hình ảnh công ty. Tuy nhiên, việc website có tốc độ chậm sẽ làm giảm trải nghiệm người dùng và ảnh hưởng tới hiệu quả kinh doanh của doanh nghiệp. Với WP Rocket, doanh nghiệp có thể mang đến cho người dùng trải nghiệm tốt hơn.

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