Performance testing services check how fast and stable your application is when many people use it at once. Doing it before a launch or a busy season means you find the slow spots yourself, not your customers. This guide explains what is included, which metrics matter, and how to choose a provider.
Types of performance testing
- Load testing: behaviour at the traffic you expect.
- Stress testing: where the system breaks, and how it recovers.
- Spike testing: sudden jumps in users, such as a sale or a marketing campaign.
- Endurance (soak) testing: whether performance holds over hours or days, and whether memory leaks appear.
- Scalability testing: how performance changes as you add servers or users.
Metrics that matter
- Response time, including the slowest 5 or 10 percent of requests, not just the average.
- Throughput: requests or transactions handled per second.
- Error rate under load.
- Resource use: CPU, memory, database and network.
When to do it
- Before a launch or a major release.
- Before a busy period, such as a sale, a campaign or month-end.
- After changes to architecture, hosting or the database.
- When users report slowness that you cannot reproduce.
What a performance testing service delivers
- A test plan based on real user journeys and expected traffic.
- Test scripts, for example in JMeter, that you can re-run.
- A results report with bottlenecks and clear recommendations.
- Retesting after fixes, to confirm the problem is solved.
What affects the price
- The number of user journeys and systems in scope.
- The load level to simulate and the test environment needed.
- Whether it is a one-off test or continuous performance testing in your pipeline.
- Reporting and retesting rounds.
How to choose a provider
- Ask for a sample report. It should name specific bottlenecks and fixes, not only charts.
- Check that they test in an environment close to production.
- Ask how they model realistic user behaviour.
- Confirm retesting is included.
- Look for reviews and case studies, such as our fintech performance testing case study.
If you are in Pune, see our page on load and performance testing services in Pune.
Try it on your own product
Stelo Technology provides performance testing services. Start a risk-free 2-week trial on your real product: we onboard, test your current sprint, automate a critical flow and send a quality report. You keep the bug reports and test cases either way.