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[release/9.0-staging] [WinHTTP] Certificate caching on WinHttpHandler to eliminate extra call to Custom Certificate Validation - #114678
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liveans merged 3 commits intoMay 7, 2025
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…ll to Custom Certificate Validation
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Tagging subscribers to this area: @dotnet/ncl |
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Copilot reviewed 5 out of 7 changed files in this pull request and generated 1 comment.
Files not reviewed (2)- src/libraries/System.Net.Http.WinHttpHandler/src/System.Net.Http.WinHttpHandler.csproj: Language not supported
- src/libraries/System.Net.Http.WinHttpHandler/tests/UnitTests/System.Net.Http.WinHttpHandler.Unit.Tests.csproj: Language not supported
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MihaZupan
approved these changes
Apr 17, 2025
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src/libraries/System.Net.Http.WinHttpHandler/src/System/Net/Http/WinHttpHandler.cs
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Approved via email by @SteveMCarroll on 5/7 |
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/azp run runtime-libraries-coreclr outerloop |
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Azure Pipelines successfully started running 1 pipeline(s). |
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/ba-g test failure is unrelated: #115359 |
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Backport of #111791 to release/9.0-staging
Customer Impact
Reported by customer (Identity team) - it was blocking their migration to WinHttpHandler and gRPC on .NET Framework (as first step of migration to .NET).
They reported slow performance due to creation of certificate chain in CertificateValidationCallback on each request.
This change caches certificate chain per connection as an opt-in feature (the default path is not affected).
They observed perf improvements on privates from %17.2 CPU to %0.61.
Regression
No - it was behaving this way since WinHttpHandler OOB package was introduced during .NET Core 1.0 shipping in 2016.
Testing
CI + Manual testing
Customer validated private bits against 9.0 servicing branch.
Risk
Low: This is under a feature switch (opt-in), it will not affect customers unless they enable the switch and opt-in into the feature.