JMeter JSR223 and Groovy Scripting, Tested
JMeter JSR223 and Groovy, tested: cached Groovy ran 55x faster than uncached, a cached ${n} kept its first value, and a failing PostProcessor still passed.
12 min
Articles by Bogdan
16 min
WebSocket Load Testing With k6 and JMeter, Tested
WebSocket load testing with k6 and JMeter, tested: 2,000 open sockets, refused handshakes that still exit 0, and a timeout that shifts every later JMeter reply.
10 min
k6 Checks: Assertions, Thresholds and Exit Codes
k6 checks explained with real runs: 66% failed checks still exited 0, one check name can carry its own threshold, and a check that throws ends the iteration.
12 min
k6 Stress Test: Scripts, Breaking Points and Recovery
How to write a k6 stress test, with real runs: a ramping-vus test passed at 4x load with 0% errors, while an arrival-rate test at 2x capacity failed 50%.
14 min
Load Balancer Testing: 6 Checks, Run Against nginx
Load balancer testing with real runs: one hung backend stopped all traffic for 30 s while k6 reported 0% errors. Six checks and how to run each one.
12 min
Selenium Load Testing: What One Browser User Costs
Selenium load testing, measured: 20 headless Chrome users took 12.1 GiB and ran slower than 5, while k6 simulated 1,000 users in 296 MiB. When browsers belong.
10 min
k6 Reports: Summary, JSON, CSV and HTML Dashboard
k6 report formats tested on v2.3.0: the end-of-test summary, JSON and CSV output, handleSummary, and the HTML dashboard export k6 skipped on a 19-second run.
7 min
k6 TypeScript: Run .ts Load Tests Without a Build Step
k6 runs .ts files directly since v0.57, but it strips types without checking them. 11 TypeScript cases tested on k6 v2.3.0, and the decorators that hung it.
15 min
JMeter Timers: Constant Throughput, Random and More
JMeter timers tested: the Constant Throughput Timer counts samples, not iterations, and Poisson Random Timer pauses had a standard deviation of just 13 ms.
14 min
JMeter vs Locust: The Same Test Run in Both Tools
JMeter vs Locust, tested: at 2,000 users Locust ran 12 threads to JMeter's 2,039, but one Locust process tops out at one CPU core. Scripts, reports and CI.
13 min
k6 Scenarios: Executors, Sequencing and Thresholds
k6 scenarios explained with real runs: all 6 executors, startTime chaining, per-scenario thresholds, and a rate test that dropped 686 of 1,001 iterations.
15 min
JMeter Logic Controllers: If, Throughput, Loop and More
JMeter logic controllers tested in one plan: If, Throughput, Loop, While and Transaction, with sample counts and an If condition 22x slower in JavaScript.
12 min
hey Load Testing: A Tutorial With Real Output
hey load testing tutorial: install hey, read its report, send POSTs with tokens, and avoid the exit code 0 that hides failed runs. Tested on hey 0.1.5.
13 min
JMeter HTML Report: How to Generate and Read It
Generate the JMeter HTML report, read each table and graph, and fix the default that hid 10,000 slow samples from p99. Tested on JMeter 5.6.2 with real results.
14 min
JMeter Thread Groups: Types, Settings and Real Runs
JMeter thread groups explained: standard, setUp, tearDown and Open Model groups, the five error actions, and an open model run with 1,732 threads at once.
13 min
JMeter vs Gatling: The Same Test Run in Both Tools
JMeter vs Gatling, tested: the same 2,000-user run took 2,037 threads in JMeter and 65 in Gatling. Scripting, protocols, reports, CI exit codes and scaling.
14 min
Performance Testing Interview Questions and Answers
Performance testing interview questions with answers: test types, metrics, Little's Law, workload models, bottlenecks, and 4 scenarios, with real test numbers.
15 min
wrk Load Testing: A Benchmark Tutorial With Real Output
wrk load testing tutorial: install wrk, read its output, send POSTs with Lua, and avoid the 2-second timeout that hides slow responses. Tested on wrk 4.2.0.
14 min
Apache Bench (ab): A Load Testing Tutorial With Real Output
Apache Bench tutorial: install ab, run a test, read every output line, send POSTs and headers, and avoid the -t 50,000 cap. Tested on ab 2.3 with real output.
11 min
Vegeta Load Testing: A Tutorial With Real Output
Vegeta load testing step by step: install, attack at a fixed rate, write targets files, read reports, ramp up and gate CI. Tested on 12.13.0 with real output.
12 min
Artillery Load Testing: A YAML Tutorial With Real Output
Artillery load testing step by step: install, write a YAML script, set arrival phases, read results, fail CI on a threshold. Tested on 2.0.34, 1,120 requests.
11 min
Gatling Load Testing: A Java Tutorial With Real Output
Gatling load testing step by step: set up Maven, write a Java simulation, inject users, read the report, fail the build on assertions. Tested on 3.16.0.
13 min
Correlation in JMeter: Extract and Reuse Dynamic Values
Correlation in JMeter, step by step: find dynamic values, pick the right extractor, reuse tokens and IDs. Tested on JMeter 5.6.3 with and without extractors.
15 min
JMeter Interview Questions and Answers
JMeter interview questions with answers checked against the JMeter 5.6.3 manual: thread groups, timers, correlation, CLI mode, distributed runs and 4 scenarios.
12 min
JMeter vs LoadRunner: Cost, Protocols and Scripting
JMeter vs LoadRunner compared on licence cost, 180+ protocols vs 10 protocol families, scripting, scaling and OS support, with OpenText's 2026 names and limits.
11 min
Locust Load Testing: A Python Tutorial With Real Output
Locust load testing step by step: install, write a locustfile, run headless, read the stats and shape the load. Tested on Locust 2.47.0 with 1,026 requests.
6 min
Edge Locations vs Load Generator Regions in Cloud Testing
Edge locations serve your users; load generators run in cloud regions. How to pick generator locations, split users per region and know the limits.
11 min
Validating Infrastructure Auto-Scaling with Load Testing
Validate infrastructure auto-scaling with load testing: ramp shapes that expose scaling lag, time-to-scale, the error window and scale-in under load.
5 min
Cloud vs On-Premise Load Testing: 2026 Guide
Cloud or on-premise load testing? Answer five questions in order, then confirm with a two-run pilot. Links the startup, enterprise and monitoring guides.
7 min
Performance Testing Security: A 2026 Imperative
Load tests can check that security controls hold under load: rate limits, login throttling and resource caps, backed by OWASP and NIST sources.
8 min
Boosting API Throughput for Financial Platforms
Raise API throughput by finding what caps it: Little's Law, connection pools, queueing and rate limits, with worked arithmetic and how to read a load test.
11 min
Guide to Load Testing Multi-Tenant SaaS Applications (2026)
Load testing multi-tenant SaaS: model the tenant mix, test noisy neighbours and per-tenant rate limits, check data isolation, and read results per tenant.
8 min
Cloud Testing Pricing Models: Pay-As-You-Go vs Subscription
Cloud testing pricing models explained: pay-as-you-go, subscription and committed use, with break-even arithmetic and vendor prices read on 23 October 2026.
7 min
Design Load Tests for Progressive Web Apps 2026
Design load tests for progressive web apps: what service workers hide from a load test, and how to test cold-cache visits, offline sync bursts and push sending.
8 min
AI-Generated Test Scripts: What to Check Before Use
Automated test script generation with AI gives you a draft, not a verified test. A review checklist for load test scripts, with a flawed example fixed.
6 min
Continuous Validation: The Future of Testing
Continuous validation keeps checking performance after the merge, with scheduled load tests and production monitoring. Why a CI gate alone is not enough.
12 min
Performance Testing Serverless Architectures Guide 2026
Performance testing serverless architectures: measure cold starts with percentiles, ramp past concurrency limits, protect your database, and cost the test.
11 min
10 Common API Performance Issues and How to Detect Them
10 common API performance issues, from slow queries, pool exhaustion and 500s to 429 rate limits, big payloads and cache misses, and how to detect each one.
8 min
How to Set Up End-to-End Performance Testing for Multi-Cloud
Set up end-to-end multi-cloud performance testing, with distributed load generation, vendor-agnostic tooling and cost controls that hold.
7 min
Quantum Computing and Cloud Testing: What Changes Now
Quantum computers do not change load testing today. Post-quantum TLS does: what NIST and the IETF standardised, and what to measure on your endpoints.
6 min
5G and Cloud Load Testing: What Actually Changes
5G changes the client-side latency your users see, but a cloud load generator in a datacentre does not test the radio network. What 5G means for load testing.
7 min
Boosting E-Commerce Checkout Speed at Peak Load
How to keep checkout fast at peak load: measure each step, find the slow query or call, and test with a ramp that matches a sale. Includes a k6 sketch.
7 min
Opinion: Why Performance Testing in 2026 Must Include Accessibility
What performance testing can and cannot say about accessibility: WCAG 2.2 timing rules, Lighthouse and axe-core checks, and how to run them beside load tests.
9 min
Scripted vs Codeless API Load Testing: Which Approach Fits Your QA Team in 2026?
Compare scripted and codeless API load testing tools in 2026. Discover strengths, limitations, and decision criteria to optimize your API's performance.
6 min
Scripted vs AI-Driven Load Testing: 2026 Insights
Explore scripted vs AI-driven load testing approaches. Learn strengths, limitations, and decision criteria for 2026 performance optimization.
10 min
Top 7 Network Protocols Every Tester Must Know in 2026
Seven protocols load testers meet in 2026 (HTTP/1.1, HTTP/2, HTTP/3, WebSocket, gRPC, MQTT, SQL), what a test measures for each, and which tools support them.
8 min
How to Integrate Load Testing Results with Business KPIs for Better Decision Making in 2026
Relate load test results to business KPIs honestly: conversion by response-time bucket, SLOs and error budgets, and cost per request, with worked examples.
8 min
Guide to Integrating Performance Testing with DevOps Toolchains (2026 Edition)
Wire load tests into CI/CD: which stage runs what, how to fail a build on thresholds, and how to keep results on GitHub Actions, GitLab, Jenkins and Azure.
9 min
Synthetic Monitoring vs. Real User Monitoring: The Definitive 2026 Comparison for Website Performance
Synthetic monitoring against real user monitoring: what each one sees, where they disagree, and how to decide which belongs in your stack.
5 min
What is Endurance Testing (Soak Testing)?
Endurance testing and soak testing are the same practice: normal load held for hours. What it catches, how long to run it, and how to read the trend.
9 min
What is Spike Testing in Performance Testing?
Spike testing applies traffic suddenly instead of ramping. Why autoscaling and cold caches fail in that window, and why recovery is half the test.
9 min
What is Volume Testing in Software Testing?
Volume testing increases the data a system holds rather than the user count. What it finds, how to run one, and how to read the curve it produces.
9 min
Cloud-Based vs On-Premise Website Monitoring: Which Approach Wins in 2026?
Cloud vs on-premise website monitoring: what each can see, where private networks and data rules matter, and when running both is the sensible answer.
8 min
Continuous Performance Testing: What It Is and How to Set It Up
Continuous performance testing runs load tests on every change. What to run per pull request, nightly and before release, and how to fail a build on thresholds.
9 min
Guide to Performance Testing APIs with OAuth2 Authentication (2026 Edition)
OAuth2 makes load testing harder because tokens expire mid-test and refresh adds its own latency.
8 min
How to Monitor Your MCP Server (Step-by-Step Guide)
Monitor an MCP server over Streamable HTTP: send a real JSON-RPC tools/list check, assert status, body and latency, and alert on auth and version errors.
8 min
Schedule recurring load tests, and get alerted only when performance breaks
A scheduled test only helps if it alerts, since nobody reads a passing report. Match frequency to deploy cadence rather than running nightly by default.
9 min
How to Simulate Realistic User Behavior in Load Testing Scenarios (2026 Guide)
Mix journeys by real proportion rather than testing each endpoint evenly. Vary data per user, or caching makes the system look faster than it is.
10 min
Top Cloud Testing Challenges and How to Overcome Them in 2026
The main cloud testing challenges: environments unlike production, risky test data, noisy shared hardware, third-party services and cost, with a fix for each.
8 min
Top 6 API Performance Testing Challenges (and How to Solve Them Effectively in 2026)
The six problems that most often undermine API performance tests (dependencies, test data, auth, load model, metrics, CI) and a concrete fix for each.
20 min
k6 vs JMeter vs Gatling vs Locust: A Practical Comparison for 2026
k6 vs JMeter compared in practice, plus Gatling, Locust and LoadRunner: scripting language, protocols, CI/CD, reporting and what scaling really costs.
12 min
What are Virtual Users (VUs) in Load Testing? Definition + Examples
A virtual user simulates one person's session, pauses included. How VUs differ from requests per second, and why think time decides the ratio.
12 min
Load Testing vs Stress Testing: Key Differences and When to Use Each
Load tests verify how your system behaves under expected traffic. Stress tests push past it to find the breaking point.
8 min
How Serverless Architecture Changes Performance Testing
Serverless changes how you read load test results: cold starts, throttling and downstream limits look different on the client and in the provider metrics.
6 min
Simplified Test Script Creation for Load Testing
Simplified test script creation: five ways to get a load test script (write, record, import, AI draft, in-browser) and the checks any generated script needs.
8 min
How to Cut API Response Times With Targeted Load Testing
Cut API response times: find the slowest endpoint, split its time by dependency, parallelize or cache the critical path, then retest the percentiles.
8 min
Why Intuitive Dashboards Matter in Load Testing Platforms: The Untold Accelerator for Team Performance in 2026
What an intuitive load testing dashboard shows: percentiles instead of averages, error rate, throughput, results per region and a trend against a baseline.
7 min
How to Measure Mobile App Load Times With Cloud Load Testing
Measure mobile app load times with cloud load testing: record the launch requests, replay them under load from your users' regions, and read p95 and errors.
16 min
Guide to Setting Performance Benchmarks for Web Applications in 2026
Performance benchmarks for web applications: Google's targets (LCP 2.5 s, INP 200 ms, CLS 0.1 at p75), p95 response time goals under load, and how to set them.
10 min
Cloud Load Testing vs On-Premise Solutions for Startups: A 2026 Comparison Guide
A startup guide to cloud vs on-premise load testing: what each costs in engineer time, where compliance really bites, and a rule for when to switch.
11 min
10 Ways to Optimize API Performance Testing for Faster, More Reliable Results (2026 Guide)
Ten ways to get faster, more reliable API performance test results: p95 targets, load in requests per second, varied test data and CI gates, with a k6 example.
11 min
How to Create Realistic Load Testing Scenarios for E-Commerce Websites in 2026
Realistic e-commerce load testing: build the browse, search, cart and checkout mix from your funnel, give each shopper unique data and keep payments safe.
7 min
Cloud Testing Trends 2026: What CTOs Need to Know
Cloud testing trends in 2026 for CTOs: six decisions on pipeline placement, test ownership, load generation, vendor risk, test data and AI use.
5 min
Why User-Friendly Testing Platforms Matter for DevOps Teams in 2026
What makes a testing platform usable for a DevOps team: five checks to run in a trial, where easy tools fall short, and what LoadFocus offers.
9 min
LoadFocus vs JMeter Comparison: Which Load Testing Tool Fits Enterprise Needs in 2026?
LoadFocus runs your JMeter scripts in the cloud. Compare self-run Apache JMeter and LoadFocus on scaling, protocols, reporting and CI/CD for enterprise teams.
12 min
Top 7 Cloud Testing Tools for Performance Testing in 2026
Seven cloud performance testing tools compared for 2026: what scripts each runs, where the load comes from, and how each fits CI, checked on vendor sites.
11 min
How to Set Up Automated Load Testing for Microservices Using LoadFocus (2026 Guide)
Automated load testing for microservices with LoadFocus: one test per service, pass/fail thresholds, a CI/CD gate and scheduled runs, step by step.
8 min
Sample Non Functional Requirements: A Complete Guide for Business Owners and DevOps Engineers
Sample non functional requirements with measurable targets for performance, availability and security, plus a template, e-commerce examples and tests.
6 min
Rest Assured API Testing: Guide for Business Owners & DevOps
REST Assured is a Java library for functional API tests. Set up 6.2.0 with JUnit 5, run it against a public API, and see why it is no load tool.
12 min
What Is a Canary Deployment? A Complete 2026 Guide for Business Owners and DevOps Teams
A canary sends a small traffic slice to the new version so failures stay small and reversible.
8 min
What is Concurrency Testing in Software Testing?
Concurrency testing finds races, deadlocks and lost updates when operations overlap. Runnable Python demos with fixes, and how it differs from load testing.
7 min
Using CSV Data in JMeter Tests
Using CSV data in JMeter tests: plan the file, give every thread its own rows, handle end of file, pick a sharing mode and parameterise logins.
6 min
AI Load Testing Without Code: Analysis by Tech Stack
Run a load test without writing a script, then get AI analysis tuned to your tech stack. What it reads, what the output looks like, and what it cannot tell you.
8 min
Contract Testing Guide: Definition, Process, and Examples
Contract testing checks that a provider and consumer still agree, without running both together.
5 min
Best Chrome Developer Tools for Mobile
Chrome developer tools for mobile: remote USB debugging shows the real device, device mode is for layout, and throttling shows what slow connections do.
5 min
5 Top gRPC Load Testing Tools
gRPC load testing tools must speak HTTP/2 and protobuf. Compare five options, and test streaming calls separately because they behave differently under load.
5 min
5 Most Popular Bug Tracking Tools
Bug tracking tools compared: the workflow matters more than the tool, repository integration keeps issues tied to code, and reporting surfaces repeat bugs.
7 min
Best Android App Automation Testing Tools
Android app automation testing tools compared: Appium for cross-platform reuse, Espresso for speed, and why device coverage costs more than the framework.
8 min
10 Best Mobile App Security Testing Tools
Mobile app security testing tools: static and dynamic analysis find different problems, insecure storage is the common finding, so test the release build.
6 min
LoadFocus API With Bitbucket Pipelines: Setup Guide
Run a saved LoadFocus JMeter test from Bitbucket Pipelines and stop the build on a missed threshold. Config checked against Bitbucket docs, plus the CLI traps.
6 min
5 Most Popular Penetration Testing Tools In 2026
Penetration testing tools find known issue classes while testers find system-specific ones. Scan regularly, pen test periodically, and get authorisation first.
7 min
Top SAP Testing Tools in 2026
SAP testing tools for 2026: transaction coverage and test data matter more than the framework, and upgrades drive regression cycles that automation repays.
6 min
Best Enterprise Load Testing Tools in 2026
Enterprise load testing tools for 2026 compared on distribution, access control, reporting and CI fit, plus the expertise budget that often exceeds the licence.
12 min
Top 10 Test Automation Statistics in 2026
Test automation statistics for 2026, and how to read them: useful for direction and framing investment, not for benchmarking or setting your team's targets.
10 min
The Ultimate Guide to Negative Testing
Negative testing checks that a system rejects what it should. Cover invalid, boundary and malformed inputs, and assert on the error returned, not just failure.
12 min
10 Most Popular Test Automation Frameworks – The 2026 Guide
Test automation frameworks for 2026: pick one in your team's language, run it headless in CI, and remember test design matters more than framework choice.
10 min
Overcoming Top 10 Enterprise Performance Testing Challenges
Enterprise performance testing challenges: environment parity, test data and team coordination block releases, and testing late makes findings architectural.
11 min
The Ultimate Guide to Enterprise Software Testing
Enterprise testing is dominated by integration and data, not by writing more unit tests.
6 min
14 Best Asset Management Software For IT Teams In 2026
IT asset management software for 2026: automatic discovery, licence compliance and ticketing integration matter more than the asset database itself.
5 min
6 Best Network Monitoring Software Reviewed For 2026
Network monitoring software reviewed: watch the path rather than just the endpoints, baseline normal traffic first, and use both SNMP and flow data together.
6 min
10 Best Cloud Management Platforms of 2026
Cloud management platforms compared: a CMP earns its place with multi-cloud or cost governance, and drift handling is where the promises usually break.
5 min
How To Improve User Experience Using Synthetic Monitoring
Synthetic monitoring runs a scripted journey on a schedule, so you find failures before users report them.
7 min
10 Best Observability Tools in 2026
Observability tools for 2026: ask new questions without new instrumentation, start with traces if you choose one pillar, and watch cardinality costs closely.
11 min
10 Best Redis Monitoring Tools for 2026
Redis monitoring tools compared: Redis Insight, Prometheus, Datadog, New Relic, Dynatrace and 5 more, plus the INFO, SLOWLOG and LATENCY metrics to alert on.
5 min
10 Best SaaS Affiliate Programs in 2026 (High-Paying)
SaaS affiliate programs that pay well in 2026: recurring commission beats one-off payouts, and cookie windows and attribution decide what you actually earn.
6 min
8 Best Antivirus Software Of 2026 (Windows and Mac)
Antivirus software for Windows and Mac compared on performance impact and false positives, since detection rates now cluster closely across the top tools.
7 min
Best 12 Screen Capture Tools in 2026
Screen capture tools for 2026 compared on annotation, video for timing issues, and where recordings are stored, since screens often hold customer data.
8 min
Top 5 SSL Certificate Monitoring Tools to Keep Your Website Secure in 2026
SSL certificate monitoring tools prevent expiry outages. Alert weeks ahead, since renewal and deployment are separate steps, and check the deployed chain too.
6 min
Top 5 APM Tools for 2026
APM tools compared for 2026: trace quality is what gets you from alert to cause, and data-based pricing makes your sampling policy matter as much as features.
57 min
How to Speed Up Your WordPress Site in 2026 (Ultimate Guide)
Caching and image optimisation deliver most of the available gain on WordPress.
10 min
How to Monitor and Check the Performance of an API Deployed on Azure
Monitor an API on Azure with Application Insights, Azure Monitor alerts, Standard availability tests and API Management analytics, plus a check from outside.
10 min
12 Best JMeter Alternatives for Load Testing in 2026
JMeter alternatives for load testing in 2026: k6 and Gatling for code-first teams, hosted tools for teams without a performance engineer, and migration costs.
6 min
How to Set Up Domain Expiration Monitoring: A Step-by-Step Tutorial
Domain expiry takes sites down completely and is entirely preventable. Alert weeks ahead, not days, since transfers and payment issues take time.
7 min
How to Optimize Interaction to Next Paint for Better SEO
INP replaced FID and measures responsiveness across the whole visit, not just the first input.
5 min
From Slow to Superfast: How to Improve Your Website Speed in 10 Easy Steps
The biggest wins are usually images, requests and caching, in that order.
11 min
Quickly Establish a Performance Baseline: A Simple Guide for Immediate Results
A baseline turns future runs into comparisons instead of isolated numbers. Capture it on a stable build under representative load, then leave it alone.
8 min
Generating Dynamic IDs in JMeter for Enhanced Test Automation
Three ways to generate unique IDs in JMeter test plans: the __UUID function, the Counter config element and __time, with when to use each.
7 min
Understanding GitHub Actions: Step by Step Guide for Beginners
A workflow is triggered by an event and runs jobs made of steps, which is the whole model.
7 min
What Is Playwright? An Automation Framework Tutorial
Playwright drives Chromium, Firefox and WebKit through one API. Auto-waiting removes most of the sleep-based flakiness older frameworks suffer from.
5 min
Avoid These Common Mocking Mistakes in API Testing
A mock that never fails teaches you nothing. Model timeouts and errors, not just the happy path.
8 min
How to Make a JMeter Request Execute Faster
Is a slow JMeter request the server or the load generator? Split elapsed time into connect, latency and download, then fix keep-alive, listeners and the plan.
4 min
Top 10 Lessons Learned in Load Testing This Year
Most lessons are about realism: data, think time and environment parity. A result nobody acts on is the same as not testing.
9 min
What is JSON Schema? A Step-by-Step Guide!
It turns API documentation into something machine-checkable in tests. Start with required fields and types; add constraints once the basics hold.
6 min
How to Fix Slow Loading Pages: 6 Practical Tips to Improve Site Speed
Measure before optimising. Most slow pages have one dominant cause, not six small ones.
5 min
Google’s Best-Kept Secret: How Page Speed Insights Can Skyrocket Your Rankings!
PageSpeed Insights reports both lab and field data, and only the field data affects ranking.
4 min
Flaky Tests in Software Testing: Causes, Identification, and Best Practices
A flaky test is worse than no test, because it trains the team to ignore red builds.
4 min
I want to load test my new website. Where do I begin?
Start with the objective: a target user count and an acceptable response time. Run a small test first to validate the setup, then scale up.
6 min
Improve your Website’s SEO for Better Search ranking
Content that answers a real query outranks technically perfect pages about nothing. Site speed and crawlability are prerequisites rather than tactics.
10 min
How to Measure the Right Key Metrics During Performance Testing
The performance testing metrics worth tracking: response time percentiles, throughput, error rate, concurrency, and CPU, memory, disk, network and DB load.
3 min
Why you should start improving the images on your website
Images are usually the largest thing on a page and the easiest to fix. Modern formats and correct dimensions cut weight without visible quality loss.
4 min
Too many Cloud Testing Tools are Distracting and Addictive. Here’s How to Fix It.
Tool sprawl fragments results so no single view is trustworthy. Consolidate on what integrates with your pipeline rather than what demos best.
9 min
Why are Percentiles More Useful than Averages in Performance Testing
The 90th percentile is the value 90% of measurements stay at or under. How to calculate p90, p95 and p99, with a worked example, and why they beat the average.
3 min
So you want to become a Software Testing Expert?
Depth in one area beats shallow familiarity with every tool. Automation is a skill within testing, not a replacement for knowing what to test.
10 min
What is Hits per Second in Performance Testing?
Hits per second counts every request including assets, so it exceeds page views substantially. It shows server workload rather than user activity.
2 min
How to create Multilingual Reports for Performance Tests
Set the language per report rather than per account when teams are mixed. The numbers are the same either way, so this is about adoption, not accuracy.
5 min
Understanding Standard Deviation in Performance Testing
Standard deviation in performance testing: how far response times spread around the mean, how to calculate it, what counts as high and why to pair it with p95.
7 min
How to Record JMeter Tests With a Chrome Extension
Record a JMeter test in Chrome with the LoadFocus extension, clean up the .jmx file and run it in the cloud. Covers JMeter's own recorder as an alternative.
6 min
Which language is used in JMeter?
JMeter is written in Java and needs a JRE. Test plans are XML; in-test scripting uses Groovy (JSR223), Beanshell or JavaScript. What that means for you.
3 min
Using TestCafe for End to End Testing
TestCafe runs without WebDriver, which removes most of the setup friction. End to end tests are expensive, so keep them to the journeys that matter.
4 min
Building your in house Device Farm on Mac OS using OpenSTF for Android Testing
OpenSTF gives you remote access to real Android devices, which emulators cannot fully replace.
3 min
Mocking APIs using WireMock for testing negative cases when it is not possible to change the API behaviour
WireMock lets you produce failures a real API will not give you on demand: timeouts, 500s, malformed bodies.
2 min
Visual UI Regression Testing with Jest, Puppeteer and Headless Chrome
Image comparison catches visual breakage that assertions never check for. Run in a consistent environment; a different OS produces different pixels.
2 min
How to Load Test your Cryptocurrency Exchange Service
Exchanges fail at the order book and matching engine, not at the marketing pages.
3 min
Screenshot Comparison Tools
Pixel comparison catches visual regressions that functional tests never assert on. Set a tolerance, or antialiasing and fonts will fail every run.
3 min
How to Make a Recording of your Native Application for Demo or Debugging purposes
A screen recording captures the exact sequence that reproduces a bug, which a description rarely does.
10 min
How to use Apache JMeter’s WebDriver Sampler to Load Test the UI of an Application
The WebDriver Sampler measures real browser rendering, which HTTP samplers cannot see. Use it to measure front-end timing, not to generate volume.
6 min
How to Open a New Tab using Selenium WebDriver with Java?
Open a new tab in Selenium WebDriver with Java: Selenium 4's switchTo().newWindow(WindowType.TAB), Ctrl+click on a link, and switching between tabs by handle.
5 min
How to find by XPath text that contains apostrophe (single quote) in Selenium WebDriver
Wrap the literal in double quotes instead, which is the simplest fix. Use concat() when the text contains both quote characters.
5 min
Find all the Links on a Webpage with Selenium WebDriver in Java
Find all links on a page with Selenium WebDriver in Java: findElements(By.tagName("a")), filtering hrefs, checking status codes and avoiding stale elements.
4 min
How to Select a Dropdown in Selenium WebDriver using Java
Use the Select class for real select elements, and normal clicks for custom widgets.
8 min
How to use User Defined Variables in Apache JMeter
How to add User Defined Variables in Apache JMeter, reference them with ${name}, override them from the CLI with -J, and keep environments in one place.
3 min
How to scroll web page UP or Down using Selenium WebDriver?
Selenium 4.2+ scrolls natively with wheel actions (scrollToElement, scrollByAmount); the JavaScript executor scrollBy and scrollIntoView work in every version.
3 min
Enable gzip compression on NGINX
gzip on NGINX is a few lines of config and usually the cheapest bandwidth win available.
8 min
How to use assertions in Apache JMeter tests
Assert on content as well as status, since a wrong body is still a failure. Keep assertions cheap. Heavy ones distort the timings you are measuring.
14 min
JMeter Load Testing: A Step-by-Step Tutorial
JMeter load testing step by step: install JMeter 5.6.3, build a test plan, run it in CLI mode, read the HTML report and scale past one machine to the cloud.
5 min
Top 10 Performance Testing Tips and Tricks
Decide what you are measuring and why before configuring anything. Choose the metrics up front, or you will report whatever looks best afterwards.
5 min
How to take screenshots with Selenium WebDriver
Screenshots on failure turn an unhelpful stack trace into something you can diagnose. Name files by test and timestamp or you cannot match them to runs.
4 min
How to Pass Traffic Through a Proxy with Selenium WebDriver
A proxy lets you inspect, record or modify the traffic a browser test generates. HTTPS needs the proxy certificate trusted or every request fails.
9 min
JMeter Distributed Testing: Step-by-Step Setup
JMeter distributed testing step by step: start jmeter-server on each worker, set up the RMI keystore and ports, run with -R and size threads per worker.
5 min
How to Debug Mobile HTML5 and Native Applications?
HTML5 apps can be debugged with remote browser tooling; native apps need a proxy or device logs.
9 min
What is the max number of concurrent users a JMeter can handle?
JMeter has no fixed thread limit: one machine's ceiling depends on CPU, heap and think time. How to measure yours, what breaks first and when to distribute.
12 min
What is Throughput in Performance Testing? Definition + How to Measure
Throughput is work completed per unit of time: requests per second = completed requests / test seconds. Units, formula and how to measure it in JMeter and k6.
The Load Testing Platform with AI That Explains Your Results
Load test websites and APIs from 25 cloud regions, monitor page speed and uptime, and get AI analysis that explains your results in plain English.