[Webkit-unassigned] [Bug 170881] New: [JSC] Huge performance regression in microbenchmark/seal-and-do-work and microbenchmark/freeze-and-do-work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=170881

            Bug ID: 170881
           Summary: [JSC] Huge performance regression in
                    microbenchmark/seal-and-do-work and
                    microbenchmark/freeze-and-do-work
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ticaiolima at gmail.com

Comparing r215126 with r215394 I've found the following performance regression into microbenchmarks. Need to investigate the reason.

                             baseline                  changes                                      

freeze-and-do-work       17.8163+-1.1731     !    481.5174+-10.8908       ! definitely 27.0268x slower
seal-and-do-work         18.0572+-1.2018     !    491.9421+-18.0567       ! definitely 27.2436x slower

<geometric>              17.9014+-0.9676     !    486.4490+-11.4703       ! definitely 27.1737x slower

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