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@katiewasnothere katiewasnothere commented Jun 14, 2025

Right now swift testing does not have finer grain test parallelization controls. As a result our easy options are either to have ALL tests in ALL test suites run sequentially or have tests within a given test suite run sequentially while other test suites are run at the same time.

This has been problematic for our CI since we opted for the second option above, where, for examples, the tests in the builder test suite run sequentially, but the builder test suite runs at the same time as the container run test suite. When this happens, a lot of different tests try to pull the necessary images for testing at the same time, causing some tests to timeout.

@katiewasnothere katiewasnothere marked this pull request as ready for review June 16, 2025 17:59
@katiewasnothere katiewasnothere merged commit 157bacf into apple:main Jun 16, 2025
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@katiewasnothere katiewasnothere deleted the seq_test_suites branch June 16, 2025 19:39
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2 participants