[Webkit-unassigned] [Bug 248625] New: [webkitpy] Increase the default number of child processes spawned for arm64 Macs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=248625

            Bug ID: 248625
           Summary: [webkitpy] Increase the default number of child
                    processes spawned for arm64 Macs
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

We should increate the default number of child processes spawned for arm64 Macs, we currently spawn only 6 for a M1 Mac mini compared with 9 for the latest generation Intel one.

My local testing suggests that doubling the count to 12 appears to be stable and yields about an 18 minute speedup in overall layout test runtime.

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