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QAPerformance testing

Load Testing — know your app holds up before your users find out

We simulate thousands of real users hitting your website, app or API at the same time — and show you exactly where response times slip, errors appear and servers run out of headroom. You get hard numbers and clear fixes, before launch day or the next traffic spike.

Web apps, APIs & mobile backendsRealistic user journeys at scaleClear capacity & bottleneck report
https://shop.yourcompany.com/checkout
Load test — 5,000 virtual users
1,240 requests/sec
4.8 s (target 1.5 s)
CRITICALCheckout fails at 3,200 usersHTTP 503 from payment API
HIGHDB connection pool exhaustedMax 100 connections
MEDIUMSlow product searchMissing index on catalogue
100+Projects delivered
5 minAverage response time
p95Response times we report on
100%Client satisfaction
Overview

Your app works for ten users. Does it work for ten thousand?

Most performance problems only appear under real load — a sale, a campaign, month-end, an exam result day. Load testing recreates that traffic in a controlled way, so you find the slow queries, weak servers and misconfigured limits before your customers do. We design tests around how your users actually behave, not just how many there are.

BASIC LOAD SCRIPTXTREME INFOSEC LOAD TEST
Simple request flooding✓✓
Realistic multi-step user journeysLimited✓
Ramp-up to agreed peak loadLimited✓
Server, database & network monitoring✕✓
Root-cause bottleneck analysis✕✓
Capacity plan & tuning advice✕✓

Without load testing, you risk:

  • ●Crashes during sales, launches and campaigns
  • ●Slow pages that drive customers away
  • ●Lost revenue from failed checkouts
  • ●Over-spending on servers you don’t need
  • ●Damage to your brand on your busiest day
Get a load testing quote

or call +91 98183 63944

What we test

What we load test

Click an area to see what we measure — and an example of what we find.

Websites & web apps

Real browser-like user journeys — browse, search, log in, add to cart and pay.

WHAT WE TEST

  • Page & transaction response times
  • Concurrent user capacity
  • Session & login handling under load
  • Static asset & CDN behaviour

EXAMPLE FINDING

Checkout p95 = 6.2 s
at 2,000 concurrent users
HIGH

APIs & microservices

REST, GraphQL and internal services tested at the request rates you expect.

WHAT WE TEST

  • Requests per second & latency
  • Rate limits & throttling
  • Service-to-service dependencies
  • Error rates under load

EXAMPLE FINDING

Order API returns HTTP 500
on 9% of calls at 800 req/s
CRITICAL

Mobile app backends

The APIs and services your Android and iOS apps rely on.

WHAT WE TEST

  • App launch & login traffic
  • Push & notification bursts
  • Media upload & download
  • Third-party SDK calls

EXAMPLE FINDING

Login service times out
during push-campaign burst
HIGH

Database & caching

How your database, queries and caches behave with many users at once.

WHAT WE TEST

  • Slow & blocking queries
  • Connection pool limits
  • Cache hit rates
  • Locking & deadlocks

EXAMPLE FINDING

Connection pool exhausted
at 1,500 users → requests queue
CRITICAL

Servers & cloud

CPU, memory, network and auto-scaling across your infrastructure.

WHAT WE TEST

  • CPU, memory & disk saturation
  • Auto-scaling rules & speed
  • Load balancer behaviour
  • Cloud cost at peak load

EXAMPLE FINDING

Auto-scaling starts 4 minutes
after the spike — too late
MEDIUM

Capacity planning

How much traffic you can take today — and what you need for tomorrow.

WHAT WE TEST

  • Maximum safe user load
  • Headroom for growth
  • Breaking point & recovery
  • Right-sizing recommendations

EXAMPLE FINDING

Current setup tops out at
3,000 users — target is 10,000
HIGH
Process

How we run your load test

01

Goals & scope

Agree target users, journeys, response-time goals and the test environment.

02

Script journeys

Build realistic scripts from your analytics and real user flows.

03

Run the tests

Ramp up to peak load while monitoring every layer of your stack.

04

Analyse & report

Pinpoint bottlenecks, with clear results and tuning advice.

05

Retest

Run the test again to prove your fixes hold up at peak load.

Engagements

Pick the engagement that fits

Every engagement is scoped to your application and traffic goals. Tell us what you need and we’ll send a fixed quote.

ESSENTIAL

Single load test

One load test of your key user journeys against an agreed peak — ideal before a launch or sale.

  • Up to 3 key user journeys
  • Ramp-up to agreed peak load
  • Response-time & error report
  • Tuning recommendations
Get a quote
MOST POPULAR

Full performance programme

Load, stress and spike testing across your app, APIs and infrastructure, with root-cause analysis.

  • Everything in Essential
  • Load, stress & spike scenarios
  • Server & database monitoring
  • Executive + technical reports
  • Priority remediation support
Get a quote
CONTINUOUS

Release load testing

Load tests built into your release cycle, so every big change is checked at scale.

  • Tests on every major release
  • CI/CD pipeline integration
  • Performance trends over time
  • Dedicated performance contact
Talk to us
“Their penetration testing methodology was thorough and aligned with OWASP standards. The final report was detailed, actionable, and easy for our developers to understand.”
Shaik Ajur★★★★★
“Xtreme InfoSec identified critical vulnerabilities that other vendors missed, with excellent remediation support.”
William John★★★★★
FAQ

Questions before you start

What is the difference between load testing and stress testing?−

Load testing checks how your system performs at the traffic you expect, including peaks. Stress testing pushes past that until something breaks, to find the limit and see how it recovers. We can include both.

Will load testing affect our live users?+

We normally test on a staging environment that mirrors production. If we must test production, we agree a quiet time window and safe limits with you first.

Which tools do you use?+

Industry-standard tools such as JMeter, k6, Gatling and Locust, plus monitoring of your servers, database and cloud. We can also hand over the scripts so your team can rerun them.

How many users can you simulate?+

From a few hundred to hundreds of thousands of virtual users, generated from the cloud regions where your real users are.

Get started

Find your breaking point before your customers do.

Book a free scoping call. You’ll get clear recommendations, a timeline and a fixed quote — whether you go ahead with us or not.

+91 98183 63944

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