Knapsack Pro
Knapsack Pro

Speed up Jest tests run your 1 hour JavaScript test suite in 2 minutes
with the optimal parallelisation on Circle CI

Run Jest tests in parallel on Circle CI in the optimal way and avoid bottleneck parallel jobs.

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Without Knapsack Pro

Uneven split

CI Node 0
9 minutes
CI Node 1
20 minutes
CI Node 2
4 minutes
CI Node 3
7 minutes

With Knapsack Pro

Optimal split

CI Node 0
10 minutes
CI Node 1
10 minutes
CI Node 2
10 minutes
CI Node 3
10 minutes

How it works

Knapsack Pro in Queue Mode splits tests in a dynamic way across parallel Circle CI nodes to ensure each Circle CI node finishes work at a similar time. Thanks to that, your CI build time is as fast as possible. It works with many supported CI servers.

Diagram that shows files distributed to 3 parallel CI nodes

How to get faster Circle CI builds with dynamic test suite split instead of deterministic split

How to split E2E tests on multiple CI nodes using Cypress.io test runner

Jest JavaScript Testing and CI parallelisation how to do it?

Circle CI parallelism integration for Jest

Start using Knapsack Pro with Jest on Circle CI

Sign up and speed up your tests.

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