Implement a new --failing-and-slow-first command line argument to test runner. #24624
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…t runner. This keeps track of results of previous test run, and on subsequent runs, failing tests are run first, then skipped tests, and last, successful tests in slowest-first order. Add support for --failfast in the multithreaded test suite. This improves parallelism throughput of the suite, and helps stop at test failures quickly.
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This keeps track of results of previous test run, and on subsequent runs, failing tests are run first, then skipped tests, and last, successful tests in slowest-first order. This improves parallelism throughput of the suite.
Add support for --failfast in the multithreaded test suite to help stop suite runs at first test failures quickly.
These two flags
--failfastand--failing-and-slow-firsttogether can help achieve < 10 second test suite runs on a CI when the suite is failing.Example
core0runtime withtest/runner core0on a 16-core/32-thread system:Same suite runtime with
test/runner --failing-and-slow-first core0:Gaining a better throughput and a -20.37% test suite wall time.