Bug 248625

Summary: [webkitpy] Increase the default number of child processes spawned for arm64 Macs
Product: WebKit Reporter: Ryan Haddad <ryanhaddad>
Component: Tools / TestsAssignee: Ryan Haddad <ryanhaddad>
Status: RESOLVED FIXED    
Severity: Normal CC: aakash_jain, ap, emw, jbedard, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Other   
Hardware: Unspecified   
OS: Unspecified   

Ryan Haddad
Reported 2022-12-01 12:47:44 PST
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.
Attachments
Radar WebKit Bug Importer
Comment 1 2022-12-01 12:48:36 PST
Ryan Haddad
Comment 2 2022-12-01 12:49:29 PST
Maybe there is a better heuristic than simply doubling, but we should consider increasing the count for a short term win before we make further optimizations to overall test runtime.
Ryan Haddad
Comment 3 2022-12-05 16:04:39 PST
EWS
Comment 4 2022-12-12 13:50:58 PST
Committed 257754@main (b0febf1cc635): <https://commits.webkit.org/257754@main> Reviewed commits have been landed. Closing PR #7176 and removing active labels.
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