[Webkit-unassigned] [Bug 228429] New: [run-webkit-tests] Run largest shards first

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228429

            Bug ID: 228429
           Summary: [run-webkit-tests] Run largest shards first
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jbedard at apple.com

Alexey pointed this out a few weeks ago, and it's particularly obvious with webgl tests. Essentially, because we run tests in alphabetical order, any given invocation of run-webkit-tests will be inefficiently running towards the end, because there will be a larger shard running on a single process. The solution to this is to run the largest shards first. The potential problem with this is that we're sacrificing predictable test order, which may have an effect on flakiness. I think this trade-off will be worth it.

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