How many concurrent users can you simulate?

On the order of tens of thousands of virtual users in parallel, modelled on your real traffic. The goal isn't a pretty number, but reproducing the scenario that actually worries you.

Which performance tools do you use?

k6, JMeter and Gatling, depending on the case. We wire performance thresholds into your CI so a speed regression is caught like any other failure, before it reaches production.

What metrics do you measure?

95th-percentile response time (p95), throughput (transactions per second), error rate and CPU/memory usage. p95 matters more than the average: it describes the experience of your worst-off 5% of users, not the average user.

What do I get at the end?

A report with the bottlenecks located and concrete scaling recommendations: which component saturates first, at what load, and what to change to hold more.

When should I run performance tests?

Before a launch, a campaign or an infrastructure migration, and periodically if your traffic is growing. It's far cheaper to find your limit in a rehearsal than to find it down in production.

Servicio · Load & performance

Software performance testing

We measure how your software behaves under real load: how many users it holds, where the bottlenecks are and at what point it starts to fail. We find it in tests, not in production.

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01 / The service

What is performance testing?

Performance testing measures how your software responds when demand tightens: many users at once, traffic spikes, heavy processes. It doesn't check whether a feature is correct, but whether it stays fast, stable and available under pressure.

We simulate realistic load (load, stress, spikes and soak) while measuring response times, throughput, resource usage and errors. The result: knowing exactly how many users you hold and where your limit is, before your customer finds it.

02 / Why it matters

Why performance decides if you stay or leave

A slow site loses users and sales with every extra second. And performance and scalability problems almost never show up with ten users: they show up right when the traffic you hoped for arrives. Load testing before a launch or a campaign is the difference between scaling calmly and crashing at the worst moment.

less conversion per +1 s of load

simulated users in parallel

report with bottlenecks

Performance is business: each extra second of load time can cut conversion by around 20%. We simulate up to 10,000 users in parallel and deliver, within 24 hours, a report with the bottlenecks pinpointed.

03 / Benefits

What you gain by load testing in time

Before

Without load testing

✕Crashes right at the traffic peak

✕You don't know how many users you hold

✕Bottlenecks hidden until production

✕Blind, expensive scaling

With OteroQA✓ 4/4

What you gain with controlled load

✓

You know your real limit

We know how many users and requests you hold before degrading. You scale with data, not fear.

✓

Bottlenecks located

We pinpoint the exact component (database, API or network) that slows your system under load.

✓

Ready for the peak

We validate your campaign, your Black Friday or your launch before the real traffic arrives.

✓

Measurable performance

We set p95 and throughput thresholds and watch them so each version doesn't worsen what already worked.

04 / How we work

Our process, step by step

▸oteroqa · load test

00:00.00/5

Load modeling and scenarios

running

We define the critical flows, the number of users and the traffic pattern that reflects your real usage.

Environment and data setup

queued

We set up a representative environment with realistic data so the numbers are reliable and repeatable.

Execution: load, stress and spikes

queued

We run the tests ramping load in steps until we find your saturation point.

Metrics and bottleneck analysis

queued

We measure latency, throughput, errors and resource usage; we locate which component limits the system.

Report and recommendations

queued

We deliver the real limits, the bottlenecks and concrete actions to scale with confidence.

running pipeline…running

05 / Why choose us

Performance measured rigorously, explained clearly

We're an ISTQB®-certified team that doesn't just throw load: we interpret the metrics and tell you, in your language, which component to fix and why. We integrate the tests into your CI so performance never surprises you again.

ISTQB® certifiedk6 · JMeter · GatlingBottleneck analysisES / EN support

06 / What's included

What the service includes

✓Load, stress and spike testing

✓Soak (endurance) testing

✓p95, throughput and error metrics

✓Bottleneck analysis

✓Performance thresholds in CI

✓Report with scaling recommendations

08 / Frequently asked questions

Frequently asked questions

Load measures behaviour under expected traffic; stress pushes the system past its limit to see how and when it breaks; spike simulates sudden, sharp surges (a campaign, a press hit). Soak (endurance) holds the load for hours to catch memory leaks.

09 / Keep reading

Articles about this service

Holiday Load Testing: How to Prepare Your ApplicationLearn the importance of holiday load testing to ensure the performance and stability of your applications during peak season.

Regression Testing: What It Is and Why It's Key to Your Software's StabilityDiscover what regression testing is, when to apply it, and how it helps maintain the stability and quality of your software after every change.

Software performance testing: keys to ensure efficient applicationsDiscover how software performance testing improves application stability and efficiency with OTERO QA.

Updated: 9 July 2026

Let's start

Request a quote for your performance testing

Tell us about your product and your next traffic peak. We reply in under 24h, in Spanish or English, with a tailored proposal.

✉contact@oteroqa.com ☎+34 614 247 900