How to Run Travis CI Parallel Jobs with Build Matrix Feature Fast

How to Run Travis CI Parallel Jobs with Build Matrix Feature Fast

Travis CI allows you to run multiple concurrent jobs as part of the same CI build. Learn ow to run Travis CI parallel jobs with build matrix feature fast.

Travis CI allows you to run multiple concurrent jobs as part of the same CI build. They even allow for up to 200 parallel jobs for open source projects (the same for private repositories). You can leverage that using Travis build matrix feature to run your project way faster by splitting tests into many smaller jobs that will run a subset of your test suite.

How build matrix feature works?

Build matrix feature allows to automatically create a matrix of all possible combinations of language and environment dependent set of configuration options. For instance, when you want to test your project on 2 different programming language versions and with 2 different browsers then Travis would generate 4 parallel jobs running your tests for each programming language and browser.

Split tests across parallel jobs

We could use build matrix feature to split tests by adding to your project Knapsack Pro that will split your Ruby or Javascript tests automatically across parallel jobs in a way that all concurrent jobs would run subset of test suite and finish work in similar time so you would get the result of your test suite passing or not as fast as possible without waiting for the slowest job.

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