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Prove your Socket.IO application holds up under load

Reuse an existing Socket.IO client or browser workflow to test connections, messages, and application behavior at realistic concurrency.

Upload a Node.js scenario using socket.io-client, or run a Playwright, Puppeteer, or Selenium script that exercises the full browser experience.

Run a Socket.IO test
Socket.IO with Selenium, Puppeteer, and Playwright, surrounded by script, upload, and report icons

Trusted by

  • Pivotal
  • UBS
  • Adidas
  • Mastercard
  • Deutsche Bank
  • TP ICAP
  • RBS
concurrent users
Million+
test regions
100+
tools
17+
protocols
50+
browser, OS, and device combinations
2000+
Two example scripts: a Node.js socket.io-client script that connects, emits an event, and closes on the reply, and a Puppeteer test that loads a Socket.IO page, sends a message, waits for the echo, and takes a screenshot

Then configure a load test

Load test configuration for the Socket.io Node.js scenario: 50,000 total virtual users, 10 minute ramp up, 30 minute duration, across N. Virginia, East Asia, and West US 1

And run it to see how well your application scales

Load test results with 32 ms median response, 499 ms 99th percentile response, a concurrent users chart, and metrics by resource

Use case specific metrics

For streaming applications, standard metrics like response time and connect time often do not capture the true performance of your application. Testable makes it easy to add additional business specific metrics.

For example, you may want to measure how long it takes from the time a certain message is sent to the server to the time the expected response is received.

Custom metric example: a Socket.IO script records an Echo Time timing from sending an event to receiving the response, reported as 32 ms
Test report cards: assertions for a sample API test, an overview of 100k concurrent users and 100% success, network request details, and a response code breakdown

Run as a load test in seconds

Use Testable's leading load testing features to configure and execute various load profiles in seconds. These features include:

  • Simulating up to millions of virtual users.
  • Global scale on your infrastructure or ours, across 100+ cloud regions or on-premises.
  • A leading analytics platform including trend analysis, anomaly detection, aggregated metrics, traces, result analysis, and raw results.
  • Easy to bring your tests to Testable by creating the script in the browser, uploading all files, or linking your Git repository.
  • Success criteria that align with your business, to automatically determine success or failure.
  • Continuous load testing automation via our API or integrations.

For more details, read about our load testing and general platform features.

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