Guide to Load Testing Event-Driven Systems 2026
Load test event-driven systems by injecting events at the producer and measuring at the consumer: end-to-end latency, consumer lag, DLQ rate, duplicates.
10 min
Articles by Chris
9 min
Role of Synthetic Traffic in Performance Testing
Synthetic traffic is software-generated requests: load tests, monitors, canaries. See the uses and the risks to analytics, WAF rules and third parties.
10 min
Optimize Database Connection Pools for Peak Performance
Size a database connection pool from the database's limits, then confirm it with a load test. Defaults and limits from HikariCP, PgBouncer and PostgreSQL docs.
9 min
HTTP/3 Load Testing: Cloud Practices in 2026
HTTP/3 load testing: stock k6, JMeter, Gatling and Locust do not document HTTP/3 support. Learn what your test measures, how to check, and what to do.
10 min
Load Test Script Maintenance: What AI Can and Cannot Do
Load test scripts break when APIs, auth, dynamic values or data change. How to detect drift early, keep scripts in git, and what AI can and cannot do.
8 min
How Multi-Region Deployment Changes Load Testing Results
How to load test a multi-region deployment: generate load from each user region, measure replication lag and failover, and check DNS routing and capacity.
9 min
Set Performance Budgets for Web Apps in 2026
Learn how to set performance budgets for web apps to optimize user experience and improve loading times in 2026. Boost your site's efficiency today.
11 min
Effective Load Testing for SaaS Onboarding
Learn effective SaaS onboarding testing techniques to create load testing scenarios that enhance user experience and ensure smooth performance.
9 min
Cache Invalidation: Bottleneck in Testing
Cache invalidation decides whether a load test measures your cache or your origin. How cold, warm and purged caches change results and how to test a purge.
13 min
Avoid API Rate Limiting: 10 Common Causes
The 10 most common causes of API rate limiting and 429 errors in load tests, with the headers to read, how to back off and how to pace a test.
9 min
Configure OAuth2 Load Testing for APIs
Learn how to configure OAuth2 load testing for APIs to ensure secure and accurate performance under stress. Improve your API testing process today.
10 min
Network Jitter: Impact on Cloud Load Testing
Run a jitter test with ping, iperf or mtr, see what jitter value is acceptable, and learn what a cloud load test can and cannot show about network jitter.
10 min
Challenges in IoT Load Testing & Solutions 2026
IoT load testing for MQTT and CoAP backends: connections, keepalive, reconnect storms and retained messages, plus the tools that can generate that load.
4 min
Opinion: Why Serverless Performance Testing Is Now Non-Negotiable in 2026
Serverless scaling is not a free pass. Why cold starts, concurrency limits and per-invocation cost make performance testing non-negotiable.
19 min
Identify and Fix Memory Leaks in Load Testing
How to find memory leaks in a load test: hold a steady load for hours, trend the heap left after each GC, diff two heap dumps, fix the reference and re-run.
9 min
Detecting Performance Regressions With Automated Tests
How to detect a performance regression automatically: pinned baselines, thresholds, run-to-run noise, a rank test across runs and git bisect to find the commit.
9 min
Cloud Load Testing vs Local Load Testing for Enterprises: A 2026 Comparison
Cloud or local load testing for enterprises: how data residency, internal network access, governance and procurement should decide, not scale or cost alone.
5 min
How Serverless Computing Changes Load Testing
Serverless computing changes load testing in three ways: what triggers the code, what you measure and what you pay. A short orientation with deeper guides.
8 min
Chatbot Performance Testing: Latency, Limits and Cost
How to performance test an AI chatbot: time to first token, tokens per second, concurrency, 429 rate limits, streaming and cost per conversation.
5 min
Cloud Testing Standards That Matter for Performance Testing
Which testing standards bear on cloud performance testing: ISO/IEC/IEEE 29119, ISO/IEC 25010 performance efficiency and ISTQB, and what each defines.
7 min
Cloud Testing’s Key Role in Sustainable Software Development
Explore how cloud testing supports sustainable software development by optimizing resource usage, reducing waste, and driving green IT initiatives.
6 min
Load Testing for Media Streaming Performance
How to load test a video streaming platform: what to simulate, how to model a live-event audience, a k6 sketch, and how to read the results.
6 min
Why Performance Testing Matters More Than Ever for Cloud-Native Applications in 2026
Why performance testing matters more for cloud-native apps in 2026, as rising complexity and user expectations reshape how teams test.
5 min
Security and Compliance Standards for Cloud Load Testing
Which security and compliance standards touch cloud load testing: ISO 27001, NIST 800-53, SOC 2 and CSA CCM, and what each means for test data.
8 min
Comparing Load Testing Tools for CI/CD Pipelines: 2026 Guide to Choosing the Right Fit
Compare JMeter, k6, Gatling, Locust, Artillery and LoadFocus for CI/CD: how each runs headless, fails a build on a threshold and scales beyond one runner.
9 min
Cloud Testing vs Local Testing: Which Method Is Best?
Explore a detailed comparison of cloud testing vs local testing for mobile performance testing. Learn which approach fits your needs in 2026.
9 min
How to Optimize Mobile API Performance: A Practical Guide
Optimize mobile API performance: shrink payloads, paginate, cache, compress, cut chatty calls, refresh tokens safely and test on slow networks.
12 min
10 Best API Monitoring Tools in 2026 (Free and Paid)
A practical comparison of 10 API monitoring tools, what each is genuinely good at, which have real free tiers, and the open source options worth running.
12 min
Guide to Load Testing Microservices Architectures in Cloud Environments (2026 Edition)
Microservices load testing explained: service-level versus end-to-end tests, dependencies and mocks, tracing, autoscaling and circuit breaker behaviour.
8 min
Edge Computing and Load Testing: What Changes in 2026
Edge computing changes what a load test measures: mostly the CDN cache, not your origin. Edge function limits, how to test them, and the CDN load testing rules.
5 min
How to Load Test a SaaS Platform as It Scales
A practical plan for SaaS load testing: set targets from projected growth, model tenants, test regions, gate releases in CI and read the results.
8 min
Open Source vs Commercial Load Testing Tools: A 2026 Comparison for Enterprise Decision Makers
Open source vs commercial load testing tools compared on cost, scaling, CI/CD, support and team skills, with vendor prices read off their pages in October 2026.
8 min
How to Create Data-Driven Load Testing Scripts for Complex User Journeys (2026 Guide)
Data-driven load testing gives each virtual user different data and paths. How to pick data, keep rows unique per user, model journeys and avoid mistakes.
7 min
AI Performance Testing: What the Tools Actually Do
What AI actually does in performance testing today: script drafting, result summaries and where it stops, with tools checked against their own docs.
8 min
5 Essential Features to Look for in a Cloud Testing Platform (2026 Checklist)
Judge a platform on CI integration and result analysis, not on maximum virtual users.
8 min
Turn cURL, HAR, Postman or OpenAPI into a k6 or JMeter Load Test
Turn a cURL command, HAR file, Postman collection or OpenAPI spec into a runnable k6 script or JMeter test plan, free in your browser, then run it in the cloud.
10 min
Running k6 at Scale: k6 OSS vs Grafana Cloud k6 vs LoadFocus
Three ways to run k6 at scale: self-hosted k6 with the k6 Operator, Grafana Cloud k6, or a managed platform, with the cost and effort of each.
11 min
The Impact of Network Latency on Cloud Load Testing Accuracy: Rethinking Performance Data in 2026
Every response time a load test records includes network latency. See how test location and new connections inflate results, and how to isolate server time.
12 min
7 Common Performance Testing Mistakes (and How to Avoid Them) in 2026
Seven performance testing mistakes that make results lie: testing late, staging unlike production, fake data, averages and an overloaded load generator.
8 min
Cloud Testing Security: Best Practices for Protecting Test Data in 2026
Cloud testing security in practice: keep real data out of test environments, lock down access and secrets, and allow load generators safely.
8 min
How to Reduce API Latency With Distributed Load Testing
Test your API from several regions, read p95 and p99 per region, split each request into DNS, connect, TLS and wait, then fix the largest phase and retest.
6 min
News Analysis 2026: How AI Is Transforming Automated Load Testing for Peak Performance
AI in automated load testing today: drafting scripts, summarising results and where it falls short, plus how to run automated load tests in CI with gates.
7 min
How to Optimize Load Testing for Single Page Applications: A Practical Guide for 2026
An SPA does its work after the initial HTML, so HTTP-level tests miss most of it. Test the API calls the app makes, weighted the way the app makes them.
6 min
Why Performance Testing Should Be a Priority for Mobile-First Businesses in 2026
Mobile is most of web traffic, and phones run on slower networks and CPUs. What to measure (Core Web Vitals, API load), on which conditions, and how to test.
8 min
Mastering JavaScript for Performance: A Practical Guide
Cut JavaScript main-thread blocking: long tasks, INP, defer and async, code splitting, yielding and web workers, plus what a backend load test does not measure.
7 min
Mastering Software Performance Engineering in 2026: A Complete Guide for Business Owners and DevOps Teams
Software performance engineering builds speed in from design to production. What it is, how it differs from performance testing, and how to start, step by step.
9 min
Application Performance Monitoring Tools: 2026 Guide
Compare application performance monitoring tools: what APM shows, how Datadog, New Relic, open source options charge, and where synthetic checks fit.
10 min
What Is Smoke Testing in Software Testing?
Smoke testing verifies that a build's critical paths work before deeper testing starts. How it differs from sanity and regression testing, with examples.
7 min
Online API Tester: What It Is and Where It Stops
An online API tester sends HTTP requests from a browser. See what it does well, where CORS, private networks and secrets limit it, and when to use curl or k6.
5 min
Unit Testing vs Functional Testing: Differences & Similarities
Unit tests check a piece in isolation; functional tests check behaviour a user would notice.
6 min
Batch testing in Software Testing
Batch testing groups related cases into one run, which cuts setup cost and shortens feedback.
6 min
Top 5 Continuous Integration (CI) tools in 2026
Continuous integration tools compared: pipeline speed decides whether CI gets used, ecosystem fit saves weeks, and self-hosting means a runner fleet to run.
9 min
How to do Parameterization in JMeter
JMeter parameterization replaces hardcoded values with variables. Compare CSV Data Set Config, __P, User Parameters and random functions, run on JMeter 5.6.3.
6 min
Top Performance Testing Companies in 2026
Performance testing companies in 2026: hire for a one-off launch rather than continuous testing, and ask whether they leave scripts behind or just a report.
9 min
Effective Configuration of JMeter Ramp Up Period for Reliable Test Results
The JMeter ramp-up period is the time Thread Group takes to start all its threads. Formula, a measured 100-thread example, and why ramp-up is not concurrency.
11 min
Calculate concurrent users for load tests
Concurrent, simultaneous and active users are three different numbers, and mixing them invalidates the test.
6 min
What is the Hardest Part of Load/Performance Testing?
The hard part is realism: matching real user behaviour, data and think time.
10 min
10 Critical REST API Interview Questions for 2026 – Answered
Be able to explain status code choices, since that is where vague answers show. Knowing when REST is the wrong choice is as useful as defending it.
7 min
Performance Testing Types: Key Benefits & Examples
Soak testing finds leaks that a short run cannot, and spike testing finds recovery behaviour. Pick the type from the risk you are trying to retire.
7 min
Load Testing in CircleCI: LoadFocus API Client Setup
Run a saved LoadFocus JMeter test from CircleCI and fail the build on a missed threshold. A checked config, traps in the docs, and how to test the gate.
5 min
Best Tools for Website Accessibility Testing in 2026
Accessibility testing tools find only part of the issues: axe-core says about 57% of WCAG issues on average. Compare the tools, then add manual checks.
7 min
10 Best Website Speed Test Tools In 2026
Website speed test tools for 2026: combine lab diagnostics with field data, test from your users' regions, and chase specific fixes rather than the score.
6 min
Best Cross-Browser Compatibility Testing Tools 2026
Cross-browser testing tools for 2026: test the browsers in your analytics, use real devices for rendering bugs, and run in parallel to keep CI viable.
8 min
10 Best Codeless Testing Tools
Codeless testing tools let more people write tests, but they struggle with dynamic content, and recorded tests break on layout changes. Compare 10 options.
9 min
10 Best IoT Testing Tools in 2026
IoT testing tools for 2026: connectivity and protocol coverage matter more than device count. Simulate fleets, validate on real devices, test firmware updates.
9 min
Top Black Box Testing Techniques
Black box testing techniques that work from the specification: boundary values and equivalence partitions give the most coverage for each test written.
11 min
12 Best Practices for Performance Testing Enterprise Software
Performance testing best practices for enterprise software: set pass criteria first, use realistic data volumes, and test batch and integration windows too.
7 min
10 Benefits of Performance Testing for Your Business Success
Performance testing benefits for your business: slow pages lose conversions, early testing costs less, and results should be framed as revenue protected.
6 min
10 Best DNS Monitoring Tools for 2026
DNS monitoring tools for 2026: DNS failures take everything down unseen by app monitoring, so check several resolvers and regions, plus expiry and DNSSEC.
5 min
16 Best Infrastructure Monitoring Tools Of 2026
Infrastructure monitoring tools for 2026: collect metrics, logs and traces, alert only on user-visible symptoms, and set a retention policy before costs grow.
6 min
Best Server Monitoring Software for 2026
Server monitoring software for 2026: agent-based for depth, agentless for coverage. Alert on saturation and error rate, and plan retention and alert routing.
6 min
14 Best Cloud Security Tools Reviewed For 2026
Cloud security tools reviewed: misconfiguration causes more breaches than exploits, so start with posture management and keep alert volume triageable.
6 min
Best 12 Web Application Testing Tools in 2026
Web application testing tools for 2026: cover functional, performance and accessibility separately, and favour CI-friendly tools whose results you can diff.
4 min
10 Essential Monitoring Best Practices for DevOps & Developers
Monitor what users experience first, then the infrastructure underneath it.
15 min
15 Best JMeter Testing Tools in 2026 (And 3 Open-source Options)
15 JMeter testing tools compared for 2026, plus 3 open-source options: which ones run your existing .jmx files, which replace JMeter, and where each one fits.
6 min
Best 10 Usability Testing Tools 2026
Usability testing tools for 2026: five users surface most problems, recordings show what happened while interviews explain why. Test the task, not the UI.
5 min
12 Must-Have Chrome Extensions for Testing in 2026
Chrome extensions for testing in 2026: best for capture and inspection rather than running suites. Audit permissions first, since they see every page.
8 min
7 Best DevOps Automation Tools for 2026: The Only Guide You’ll Need
DevOps automation tools for 2026: automate build, deploy and rollback handoffs first, and prefer tools with wide integrations over ones that need a specialist.
11 min
Chromium vs Chrome in 2026: Understanding the Differences and Choosing the Right Browser
Chromium is the open-source base; Chrome adds proprietary codecs, auto-update and Google services.
6 min
Top 7 Free SSL Checkers to Ensure Reliable Certificate Installation and Site Security
Free SSL checkers verify the chain, expiry and configuration. An incomplete chain works in browsers but fails in API clients, which is why it goes unnoticed.
11 min
Best 12 Self-Hosted Status Pages for 2026
Self-hosted status pages for 2026: a status page must not share infrastructure with what it reports on, and updates should come from monitoring, not by hand.
9 min
Top 10 Tools to Monitor Core Web Vitals of Your Website
Core Web Vitals monitoring tools: lab tools diagnose, field data ranks. Track your top landing pages over time, since regressions arrive with deploys.
9 min
Top 5 GraphQL Clients for JavaScript and NodeJS in 2026
Apollo Client, Relay, urql, graphql-request and AWS Amplify compared on caching, framework support and fit, plus how to load test a GraphQL API.
13 min
10 Best Load Testing Tools for WebApps, Websites and APIs in 2026
10 load testing tools compared: LoadFocus, JMeter, k6, Gatling, Locust, BlazeMeter, LoadRunner, NeoLoad, Artillery and Loader.io, checked October 2026.
7 min
Top 10 Tools for Monitoring OAuth Client Credentials Endpoints
Monitor token acquisition end to end, not just that the host responds. Alert on latency as well as errors, since slow tokens time out downstream.
10 min
How are Parameters Sent in an HTTP POST Request?
HTTP POST parameters travel in the request body, and the Content-Type header (form-urlencoded, multipart or JSON) tells the server how to parse them.
5 min
Transform Your Business with API Monitoring
API monitoring catches failures between your services and the customers depending on them.
7 min
Unlock the Secret to Effortlessly Overcoming Load Testing Obstacles!
The recurring obstacles are environment parity, test data and interpreting results. Most of them are planning problems rather than tooling problems.
7 min
What is WebdriverIO? Unlock the Secrets of Automated Testing
WebdriverIO drives both browsers and mobile apps through the WebDriver protocol. Choose it when you need one framework across web and mobile.
7 min
What Is Puppeteer? – A Tutorial on How to Use Puppeteer
Puppeteer controls headless Chrome and suits scraping, PDFs and screenshots as much as testing.
7 min
What is a QA Team?
QA is broader than finding bugs: it covers process, risk and release confidence.
3 min
Contextual Documentation: Revolutionizing User Onboarding with LoadFocus
Dive into LoadFocus's enhanced user experience with contextual documentation. Streamline your onboarding and understand metrics with in-app guidance.
5 min
Avoid the Crash: Proven Strategies for Load Testing Azure Web Apps
Load test an Azure Web App without crashing it. Autoscaling reacts after load arrives, so test the scale-out itself, not the steady state.
9 min
How to Load Test Your PHP Website
Load test a PHP site with Apache JMeter. PHP scales by process, so the worker pool usually caps you long before the code itself does.
5 min
How Frontend Performance Testing Can Catapult Your Business to the Top
Backend metrics can look healthy while the page users see is still slow. Measure on a real device profile. Desktop numbers flatter almost every site.
4 min
CI/CD Best Practices
Keep the pipeline fast. A suite people skip because it is slow provides no safety at all.
3 min
Customizable Widgets on LoadFocus Dashboard
A dashboard is only useful if it shows the few numbers you act on. Arrange widgets around a question you ask often rather than around what is available.
3 min
Some websites are just too slow…
Users judge speed in the first couple of seconds, and most sites lose them there. Measure before assuming; the obvious culprit is often not the cause.
9 min
How to Test OAuth Secured APIs and Apps using JMeter
Test OAuth-secured APIs in JMeter: fetch the token once, extract it with a JSON extractor, reuse it in a header manager, keep it out of timed samples.
9 min
How to Use CSV Data Set to Configure JMeter Tests
Set up JMeter's CSV Data Set Config step by step: filename, variable names, delimiter, recycle and stop thread on EOF, and sharing mode, with an example.
4 min
How to Monitor Core Web Vitals for your Website with Alerts and Reports
Scheduled checks turn Core Web Vitals from an occasional audit into a trend you can act on.
3 min
How to Monitor the SEO of your Website
SEO monitoring catches silent breakage: a noindex shipped by accident, or a redirect chain.
6 min
How to Create an Alias to Easily Start JMeter on your Local Machine
Create a shell alias that starts Apache JMeter from any Mac terminal: zsh and bash profile files, Homebrew and archive paths, source, and a PATH option.
7 min
How to Load Test RESTful APIs with LoadFocus
Load test a REST API with LoadFocus: set virtual users and ramp-up, add requests with headers and a body, read p95 and errors, and set pass/fail thresholds.
4 min
How to Improve your WordPress Performance Score
Caching plus image optimisation covers the majority of the available gain. Audit plugins periodically. Each one adds queries and assets to every page.
10 min
Which is the Execution Order of Elements in Apache JMeter?
JMeter runs elements in a fixed order: config, pre-processors, timers, samplers, post-processors, assertions, listeners. The rules that trip people up.
3 min
Agile Software Release Checklist Manifesto
Releasing often only works if the pre-release checks are automated and identical every time.
10 min
How Does Apache JMeter Work?
How Apache JMeter works: threads as virtual users, samplers that send real requests, what elapsed time and latency measure, and where results go. Run on 5.6.3.
4 min
Where to find the configuration files for JMeter when installed with Homebrew?
Homebrew JMeter config files live in $(brew --prefix jmeter)/libexec/bin. Find jmeter.properties and user.properties on Apple Silicon and Intel Macs.
9 min
How to Increase Heap Size in JMeter?
JMeter starts with a 1 GB heap. Raise it with HEAP in bin/setenv.sh or setenv.bat, confirm the new size in jmeter.log, and know when more heap will not help.
7 min
How to Install Plugins using the JMeter Plugin Manager
The Plugins Manager handles dependencies, which manual jar copying does not. Install it once, then add and update plugins from inside JMeter.
5 min
Why brew install jmeter --with-plugins Fails
brew install jmeter --with-plugins fails because Homebrew 2.0 removed formula options. Plain brew install jmeter already ships the JMeter Plugins Manager.
6 min
How to Install JMeter on Mac?
Download the JMeter 5.6.3 archive for Mac from Apache or install it with brew install jmeter, then open it from Terminal. Covers Java and Apple Silicon paths.
4 min
Cypress: The Web Testing Framework of the Moment
Cypress runs in the browser alongside your app, which makes debugging far more direct.
2 min
Using Selenium IDE Record and Playback tool
Selenium IDE is the fastest way to capture a journey, and the worst way to maintain one. Use it to draft a test, then export and clean up the locators.
2 min
Chrome Extension for Google Lighthouse as a service
Running Lighthouse from an extension gives you an audit without leaving the page you are testing.
2 min
What is First Meaningful Paint (FMP)?
FMP tried to capture when the main content appeared, rather than the first pixel. Use LCP for anything current; FMP appears mainly in older reports.
6 min
What is Disaster Recovery Testing in Software Testing?
A recovery plan that has never been executed is an assumption, not a plan. Test the restore, not just the backup; backups fail silently at restore time.
6 min
What is Stress Testing in Software Testing?
Stress testing pushes past expected load to find the breaking point and the failure mode. How the system recovers matters as much as where it broke.
3 min
End to End Testing for Asos.com using TestCafe in Under 30 minutes
TestCafe needs no WebDriver, which is why a working suite is possible in half an hour.
3 min
Best Practices for Implementing E2E (End-to-End) UI Tests
E2E tests earn their cost only on the journeys that make money; everything else belongs lower in the pyramid.
13 min
How to Design Effective Load Testing Scenarios
How to design load testing scenarios: set pass/fail goals, build a workload model from real traffic, add think time and test data, then choose the load profile.
3 min
How to Click on Element with Puppeteer and Chrome
Puppeteer's page.click does not wait for the selector and throws if it is missing; wait with waitForSelector or use a locator that waits for a visible element.
3 min
Structuring integration tests using JUnit categories by features, API or type of tests
Categories let one suite be sliced by speed or area, so CI can run the fast set per commit.
4 min
What is a Staging Environment in Software Development?
The closer the parity, especially in data and scale, the more useful it is. A staging environment that drifts from production gives false confidence.
2 min
How to Visually Compare Staging vs. Production Websites Automatically
Compare the same viewport and state, or the diff is dominated by noise. Review differences rather than gating on pixel equality, which fails constantly.
2 min
How to Click a Link by Text in Selenium WebDriver Java
linkText matches the full visible text; partialLinkText matches a substring.
4 min
How to Take Screenshots with Puppeteer using Headless Chrome Browser
Puppeteer captures viewport, full-page or single-element screenshots.
3 min
Is My Email Campaign going to Bring my Website Down?
A campaign delivers its traffic in minutes, which is a spike rather than a load curve.
2 min
How to Debug ES6 in WebStorm with Babel
Debugging transpiled code needs source maps, or breakpoints land on the wrong lines.
5 min
Debugging the Traffic from a Native iPhone Application
A proxy between the device and the network is the only reliable way to see native app traffic.
3 min
How to Use the DataProvider in TestNG with a JAVA Example
A DataProvider feeds many input sets into one test method, which keeps cases out of the code.
8 min
How to Save Apache JMeter Results to a CSV file or XML file?
Two ways to save Apache JMeter results: the -l flag with jmeter.save.saveservice properties for CSV, or XML for the full sample detail. With examples.
4 min
How to Send an Android Application to Background and Reopen It
Backgrounding and resuming is where state bugs surface, so it belongs in the test suite. Verify state after resume, not just that the app reopened.
3 min
How to use Explicit and Implicit Waits in Selenium WebDriver with Java
Explicit waits target a condition; implicit waits apply a blanket timeout to every lookup.
10 min
Understanding 500 Internal Server Errors in GET or POST Requests
Why a GET or POST request returns 500 Internal Server Error: a body the server cannot parse, missing headers or cookies, exhausted pools, and how to debug it.
4 min
How to MouseOver (Hover) a WebElement using Selenium WebDriver
Hover needs the Actions class; a plain click will not trigger CSS or JS hover states.
6 min
Speeding Up Selenium WebDriver Tests with Efficient Locators
Which Selenium locator is fastest? A measured test of By.id, name, CSS and XPath in Selenium 4: XPath costs a few ms more, and stability matters more.
7 min
How to start Apache JMeter in non-graphical (non-GUI) mode?
Start Apache JMeter from the command line with -n -t -l -e -o, why GUI mode skews results, and how to run the same JMX at scale in the cloud.
9 min
How to Use Apache JMeter’s XPath Extractor?
Use JMeter's XPath2 Extractor to pull values from XML and SOAP responses, map namespaces, and see why XPath on HTML returns your default value. Tested on 5.6.3.
2 min
How to find the XPath of your Selenium WebDriver test using Chrome browser?
Chrome DevTools can copy an XPath, but the generated one is usually position-based and brittle.
2 min
How to get all the options in a select tag using Selenium Webdriver
The Select class exposes getOptions() for real select elements. Assert on the option text or value, not the count alone, which passes on the wrong list.
9 min
Using a CSV file for login credentials and extracting the token from the response when running JMeter tests
Log each JMeter virtual user in with credentials from a CSV file, extract the token from the login response with a JSON Extractor and send it on later requests.
3 min
How to Measure CPU and Memory while Running a Load Test
Response times alone cannot tell you whether the server is saturated or merely waiting.
9 min
How to install JMeterPlugins-Extras and JMeterPlugins-ExtrasLibs
JMeterPlugins-Extras and ExtrasLibs stopped at 1.4.0 in 2016. Get their graphs, samplers and JSON tools through the JMeter Plugins Manager, plugin by plugin.
5 min
How to Clear Local Storage using Selenium WebDriver?
Clearing cookies does not clear local storage, so state survives between tests. Execute localStorage.clear() through the driver's JavaScript executor.
5 min
UI and performance testing for UI heavy web applications – solutions
Combine a large HTTP load with a small number of real browser sessions. Watch client-side metrics, since the server can be fast while the page is not.
6 min
How to write a good Test Plan?
A test plan is about scope and risk: what you will not test matters as much as what you will.
7 min
How to Locate Web Elements with Selenium WebDriver?
Locate web elements in Selenium 4 with the Java By class: id, name, CSS, XPath and relative locators, with tested code and what selenium.dev recommends.
10 min
Introduction to Apache JMeter Performance Testing
JMeter for beginners: the six stages to learn in order, from test plan basics and a first request with an assertion to CLI runs, results and scaling out.
10 min
What is Response Time in Performance Testing?
Response time testing explained: what response time is, how to measure it, why p95 beats the average, and what a good response time is.
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