Bug 251328

Summary: Very slow upload speed on Safari and Safari TP when using https
Product: WebKit Reporter: OpenSpeedTest.com <support>
Component: PlatformAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Major CC: achristensen, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari 16   
Hardware: All   
OS: All   
See Also: https://bugs.webkit.org/show_bug.cgi?id=254616
https://bugs.webkit.org/show_bug.cgi?id=268293
Attachments:
Description Flags
Tested Safari, Safari TP and Chrome with TSL
none
Tested Safari, Safari TP and Chrome without TSL none

Description OpenSpeedTest.com 2023-01-28 18:39:53 PST 
Created attachment 464738 [details]
Tested Safari, Safari TP and Chrome with TSL

Left Version 16.3 (18614.4.6.1.5)
Center Release 162 (Safari 16.4, WebKit 18615.1.18.2)
Right Chrome

Observed Very slow upload speed on Safari and Safari TP when using TSL on an M1 MacMini

To Reproduce this.

You need a 10GbE Server running OpenSpeedTest Docker Container.

now, Visit 

https://<server-ip>:3001 for HTTPS Version
http://<server-ip>:3001 for HTTP Version

Ref
https://github.com/openspeedtest/Speed-Test#docker-install-instructions
Comment 1 OpenSpeedTest.com 2023-01-28 18:40:23 PST 
Created attachment 464739 [details]
Tested Safari, Safari TP and Chrome without TSL
Comment 2 Alexey Proskuryakov 2023-01-31 13:12:26 PST 
FWIW, I can reproduce much slower upload than download with actual openspeedtest.net too (6GB/s vs 1GB/s).

Unclear if this is an issue in WebKit or below yet.
Comment 3 Radar WebKit Bug Importer 2023-01-31 13:13:05 PST 
<rdar://problem/104881679>