Playwright · Senior · Question 3 of 77

Why does `fullyParallel` help balance shards?

1It makes each shard use more CPU cores at once
2Tests, not whole files, are distributed between shards
3It sorts the tests from the slowest to the fastest

Show the answer

Correct answer: Tests, not whole files, are distributed between shards

Explanation

Without it, a shard gets whole files, so one huge file can make that shard much slower than the others.

Further reading

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