Exploring API Performance Testing with Postman

The Ultimate Guide to JMeter Performance Testing Tool

At SupremeTech, we are dedicated to creating technology products that provide the best user experience. In this article, I will introduce you to JMeter performance testing, a powerful and flexible tool that significantly enhances the quality of technology products. With its ability to support various protocols, JMeter allows you to test the performance of a wide range of applications, from web services to APIs and even real-time applications. Let’s explore the types of applications JMeter can be applied to and the outstanding features it offers! For more insights into Performance Testing, check out our blogs below: The Process of Performance Testing at SupremeTechPerform API Testing using Postman Applications Suitable for JMeter Web Applications For applications using HTTP/HTTPS protocols, such as e-commerce sites, blogs, or corporate websites, JMeter can help assess response times and system performance. RESTful APIs JMeter supports load testing for APIs, measuring response times, and checking stability. Real-Time Applications (WebSocket Applications) For applications that require real-time communication, such as chat applications or online games, JMeter offers performance testing with the WebSocket Sampler Plugin, ideal for messaging systems or online monitoring. Mobile Applications JMeter can simulate requests from mobile applications to their backend APIs, such as food delivery apps or digital banking services. Database-Driven Applications For applications that rely on database queries, like CRM or ERP systems, JMeter supports performance testing using the JDBC Request Plugin to evaluate database efficiency. Custom Protocol Applications For applications using unique protocols like TCP or UDP, JMeter allows for performance simulation and testing using the TCP Sampler, which benefits  IoT applications or data transmission over local networks. Why Should Use JMeter Performance Testing Tool? Advantages Free and open source: JMeter is a cost-free tool that is easy to use.Multi-protocol support: It supports protocols like HTTP, FTP, SOAP, REST, etc.User-friendly interface: It provides an intuitive graphical interface suitable for beginners.Scalability: Supports plugins and can integrate with CI/CD tools like Jenkins.Detailed measurement: Offers comprehensive reports on performance metrics such as latency, error rates, and response times.Distributed testing: Allows load testing across multiple servers to simulate high traffic volumes. Disadvantages    Performance limitations under heavy load: JMeter may struggle with extremely high loads due to resource consumption.Not optimized for UI testing: JMeter might not be the best choice if you need to test complex user interfaces.Limited scripting flexibility: While it uses BeanShell and Groovy scripts, it lacks the flexibility of some other tools.Complex result analysis: Default reports from JMeter may not be intuitive and require external tools for advanced analysis.Learning curve: The complex features of JMeter can take time to master. What You Should Know About JMeter Plugins Plugins are an integral part of JMeter that significantly enhance its testing capabilities. Some notable plugins include: JMeter Plugins Manager: Easily manage plugins without manual configuration.PerfMon Metrics Collector: Monitors system resources like CPU, RAM, Disk, and Network during tests.JDBC Request Plugin: Tests database performance through JDBC.WebSocket Sampler: Supports WebSocket protocol testing for real-time applications.Throughput Shaping Timer: Adjusts request rates to achieve desired throughput.ElasticSearch Backend Listener: Integrates with ElasticSearch and Kibana for data analysis and visualization. Types of Reports Provided by JMeter JMeter offers various reports to help analyze and evaluate system performance: Dashboard Report: Provides an overview with graphs and data tables to track throughput, response times, and error rates.Aggregate Report: Supplies detailed aggregated data about each sampler or group of requests.Graph Results: Displays graphs showing changes in response times and throughput over time.Response Time Distribution: Shows response time distribution to identify acceptable thresholds. JMeter is a necessary tool for testers performing performance testing across various applications and protocols. Despite some limitations, its support for plugins and detailed reporting makes monitoring and analyzing system performance easy. Best of all, it is completely free! Make the most of JMeter to ensure your application runs smoothly in testing and production environments.

SupremeTech’s Expertise in the Process of Performance Testing

In the previous article discussing The Importance of Performance Testing and SupremeTech's Expertise, we understood the overview of performance testing and its significance for businesses. Let me introduce how SupremeTech manages performance and the process of performance testing to ensure our products are always ready to face real-world challenges. At SupremeTech, product performance is not just a priority but a commitment. So how to do performance testing? Below is a detailed process of performance testing that we implement to ensure applications operate stably and efficiently under any usage conditions. For more insights into Performance Testing, check out our blogs below: The Ultimate Guide to an Essential JMeter Performance Testing Tool Step 1: Application Optimization   1.1 Optimizing OPCache Infrastructure Team Responsible for configuring and fine-tuning OPCache on the server.Ensures that JIT (Just-In-Time) caching is enabled and that parameters align with system resources. 1.2 Database Optimization Back End Team Designs composite indexes to enhance query speed.Rewrites or optimizes SQL queries to improve efficiency and reduce execution time.Analyzes common queries and data flows. 1.3 Optimizing Laravel During Deployment Back End Team Considers activating Production Mode in Laravel.Executes the command php artisan optimize to optimize application configurations. Infrastructure Team Manages caching for configurations, routes, and views.Supports the deployment and integration of queues or jobs on the server system. Step 2: Preparing for Performance Testing Collaboration among teams is crucial to ensure that every preparation step is accurate and ready for the performance testing process. 2.1 Developing a Plan and Initial Estimates QC Team, Back-End Team Creates a detailed plan for each phase of performance testing.Proposes resource, time, and data requirements. Project Technical Leader (PTL) Reviews and approves the testing plan.Coordinates appropriate resources based on preliminary estimates. 2.2 Security Checklist Project Technical Leader (PTL) Develops a checklist of security factors to protect the system during testing. QC Team, Back End Team Review the checklist to ensure completeness and accuracy. 2.3 Preparing Test Data QC Team Creates accounts, test data, and detailed test scenarios.Writes test scripts to automate testing steps. Back End Team Assists in building complex test data or necessary APIs.Reviews and tests scripts to ensure logic aligns with the actual system. Step 3: Setting Up the Testing Environment Coordination between the QC and Infrastructure teams is essential to ensure an optimized testing environment is ready for subsequent phases. 3.1 Estimating Server Specifications Infrastructure Team Determines appropriate server configurations based on application needs and testing requirements.Provides optimal specifications based on available resources and product scale.Supplies information about physical resources and infrastructure to support testing. 3.2 Establishing the Testing Environment Infrastructure Team Installs and configures virtual machines for performance testing.Adjusts server parameters (CPU, RAM, Disk I/O) to meet testing criteria. QC Team Confirms that the environment is ready for testing based on established criteria. 3.3 Adjusting Parameters According to Testing Requirements Infrastructure Team Modifies server configurations based on optimal parameters suggested after initial tests.Ensures configuration changes do not affect system stability. Step 4: Conducting Tests 4.1 Performing Performance Tests QC Team Executes load tests on APIs and key functionalities.Utilizes testing tools (JMeter, k6, Postman, etc.) to measure performance. Infrastructure Team Supports environment management and monitors system resources during testing. 4.2 Reporting Results QC Team, Infrastructure Team Compiles test results (response times, CPU load, RAM usage, etc.) from various tools.Compares results against established performance targets.Sends detailed reports to stakeholders (PTL, Backend Team). 4.3 Post-Test Optimization Backend Team Analyzes test results and fixes bugs or optimizes source code and application logic. Infrastructure Team Adjusts server configurations or optimizes system resources based on test outcomes. QC Team Re-run tests after optimization to ensure improved performance is achieved.Compiles final test results and confirms with stakeholders. Step 5: Clearing Test Data 5.1 Restoring Server Configuration to Initial State Infrastructure Team Resets server configurations to their original state to reduce unnecessary resource consumption.Deletes or powers down virtual machines used during testing.Ensures no temporary configurations or unnecessary test environments remain in the system. 5.2 Removing All Test Data from Databases QC Team Identifies test data that needs deletion to prevent junk data from affecting the live system. Back End Team Safely deletes test data from the database while ensuring no production data is mistakenly removed.Verifies that the database is clean after deletion. This process of performance testing enables SupremeTech to optimize each stage effectively, ensuring our products achieve optimal performance before delivery to partners. With our experienced workforce, we consistently prioritize product efficiency and quality.

The Importance of Performance Testing and SupremeTech’s Expertise

Hello everyone, I’m Vu, a dedicated Quality Control professional committed to delivering software and applications that provide the best user experience. With over 12 years of experience in the industry, I am excited to share valuable insights on Performance Testing—an essential step to ensure that software functions smoothly and effectively before it reaches users. Even a slight delay can lead to customer loss in today's fast-paced era, making performance testing crucial for all businesses. How can systems maintain smooth operation during unexpected traffic spikes? How can we prevent crashes during peak times? The solution lies in performance testing. At SupremeTech, we provide high-quality performance testing solutions that guarantee your systems remain stable and efficient. 6 Notable Technology Incidents From the Past Healthcare.gov (2013): This insurance website crashed completely when it launched, leading to significant confusion among American citizens.Amazon Prime Day (2018): The e-commerce giant lost substantial revenue on the epic sale because the platform had crashed.Google Cloud (2019): A configuration issue caused Google Cloud to crash, affecting numerous primary services and highlighting the importance of performance testing.Zoom During the Covid Pandemic (2020): To meet the surge in online work demand, Zoom had to build its infrastructure rapidly.Facebook Outage (2021): A configuration error caused the entire Meta ecosystem to go down for 6 hours, resulting in significant reputational and financial losses.PlayStation Network (2023): Shortly after launching a new game on PlayStation 5, Sony was unprepared for gamers' inability to download it. These incidents serve as a wake-up call for all businesses. No system is immune to performance issues if it hasn't been thoroughly tested and optimized. Here are some key reasons why companies should prioritize Performance Testing for their products: Prevent Revenue Loss: A slow or crashing system can drive customers away, leading to lost revenue.Protect Brand Reputation: Major performance incidents often leave a negative impression, damaging credibility.Prepare for Growth: Testing allows you to scale operations confidently without worrying about system issues. What is Performance Testing? Performance testing is a method of testing, measuring, and evaluating a system's speed, stability, and load capacity to ensure it operates effectively under various conditions. Overview of Performance Testing: Load Capacity Assessment: Determining the maximum load limit that the system can handle.Identifying Bottlenecks: Finding weaknesses as a way to enhance performance.Improving User Experience: Ensuring users have a smooth experience while protecting brand reputation. Types of Performance Testing Load Testing: Evaluating load capacity by simulating large numbers of concurrent users. We identify the system's load threshold and address weaknesses before issues arise.Stress Testing: Pushing the system to its maximum limits to test its response in worst-case scenarios, ensuring safety.Endurance Testing: Assessing system durability when operating continuously over long periods to ensure stable performance.Spike Testing: Simulating sudden spikes in traffic, such as during major sales campaigns, helping businesses prepare for peak hours. SupremeTech's Exceptional Capabilities Flexible Integration with Various Platforms: We can conduct tests across diverse platforms, from mobile applications and websites to complex systems, ensuring optimal performance for all platforms.Detailed Data Analysis: We not only identify bugs but also provide detailed reports with optimization recommendations based on real data.  This helps you effectively address performance issues.Flexible Automated Updates: SupremeTech's automated systems allow businesses to adjust and optimize their processes easily as they grow.Dedicated Consulting Team: SupremeTech's experienced experts are ready to support you from planning through implementation and maintain high efficiency. SupremeTech - Your Partner for Optimal Performance At SupremeTech, we are committed to researching advanced technologies, maintaining professional workflows, and employing a passionate team to deliver exceptional value in all our products and services. Performance testing is more than just a technical task; it is essential for maintaining your reputation and achieving market success. Allow SupremeTech to enhance your products for today and the future. For more insights into Performance Testing, check out our blogs below: The Process of Performance Testing at SupremeTechThe Ultimate Guide to an Essential JMeter Performance Testing ToolPerform API Testing using Postman

BA Team’s Offsite Training Session: Boosting Logic and Negotiation Skills

BA stands for “Business Analyst,” but for this day, it also means “Break Away” from daily work. Our BA team recently participated in an off-site training session that was both meaningful and enjoyable. We learned valuable skills and shared laughs with a very engaging Japanese trainer through this Business Analyst training. Besides learning practical techniques, we got to see how professionals in Japan work with clear logic and how negotiation can be more creative than expected. Logical Thinking – Clear Communication Starts with Clear Thinking This part of the Business Analyst training session wasn’t about boring theories. Instead, it focused on how BAs can share ideas in ways that clients can easily understand. The goal was to avoid confusion when people understand the same message in different ways. One key idea the trainer shared was: 一文一義 (Ichi-bun Ichi-gi) – "One sentence, one idea." This means not putting too many ideas into one sentence; keep it simple to avoid confusion. The trainer reminded us: “The best communication is not using big words or complex grammar, but explaining difficult things in the simplest way.” In project discussions, what matters most is being concise, clear, and convincing, not using overly complex or lengthy sentences. One powerful tool we learned is the Pyramid Structure, a way to organize ideas clearly: Top-down communication: Start with the conclusion first, then give reasons.MECE: Ideas should not overlap, and together they must cover all important points. The Pyramid has 3 parts: Main MessageThe key point you want to say.Say it at the beginning.Key Points2–4 supporting reasons.Supporting EvidenceFacts, examples, numbers, or specific details. We practiced this method with the question:"What are the strengths of SupremeTech when promoting our brand?"  Everyone was surprised by how much clearer and more logical the answers became. Negotiation – Helping Clients Discover Their Real Needs Next, we moved into negotiation skills. The trainer gave us two surprising facts: Most clients don’t know exactly what they need at the start.Between 70% and 80% of buying decisions are made during the discussion process. As BAs, how can we help clients realize what they actually need, even if they haven’t explicitly stated it? We learned two useful techniques: 1. SPIN Questions A 4-step method to guide the conversation: S – Situation: Understand the client’s current situation.P – Problem: Identify any issues they are facing.I – Implication: Explore the impact of these problems.N – Need-payoff: Show how a solution can help. 2. BAF Focuses on: Benefit: What the client gains.Advantage: Why it works well.Feature: What the product or service includes. We did a quick practice activity: “Sell this bag to a customer.” Each group played both the BA and the client in real-life scenarios. The room was filled with energy and laughter as teams realized that simply changing the way they asked questions helped clients discover new needs they hadn’t previously considered. Example using SPIN: S (Situation): “What kind of bag do you use now?”P (Problem): “Do you ever feel it’s too small or hard to match with outfits?”I (Implication): “Is it inconvenient if you have to switch bags for different occasions?”N (Need-payoff): “Would it help to have one stylish bag that fits everything and works for all events?” And then with BAF: B (Benefit): “You can use this bag for work, travel, or outings while staying stylish.”A (Advantage): “Many office workers choose this model for its flexibility.”F (Feature): “It has 3 compartments and is made of water-resistant material.” By using these techniques, BAs can help clients understand what they truly need and make more informed decisions. “Soft Skills” – The Secret Tools of Every BA Being a BA without soft skills is like being a superhero without a cape—it feels like something’s missing! From the Pyramid Structure to SPIN and BAF, these are the soft skills that help BAs feel more confident when interacting with clients. With these tools, you don’t just meet client needs—you impress them and build stronger trust. Have you “equipped” yourself with these skills yet?If not, don’t wait—try practicing them in your next Business Analyst training meeting!