[Webkit-unassigned] [Bug 268293] New: Safari Upload Performance Issue (1500 vs 9000 MTU) (XHR POST) M1 Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=268293

            Bug ID: 268293
           Summary: Safari Upload Performance Issue (1500 vs 9000 MTU)
                    (XHR POST) M1 Mac
           Product: WebKit
           Version: Safari 17
          Hardware: Mac (Apple Silicon)
                OS: macOS 14
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: WebCore JavaScript
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: support at openspeedtest.com

Created attachment 469596

  --> https://bugs.webkit.org/attachment.cgi?id=469596&action=review

Safari upload speeds limited

Problem: Safari upload speeds limited to 5500-6700 Mbps I set MTU to 1500 MTU, Achieves full speed for upload when I set MTU to 9000. Download speeds unaffected and reach full 10Gbps.

Chrome Comparison: Chrome achieves full 10Gbps for both download and upload with both standard and jumbo MTU sizes.

Version 17.3 (19617.2.4.11.8)

Version 14.3 (23D56)

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