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disable/trim MetricsHandler when System.Diagnostics.Metrics.Meter.IsSupported is false#114326

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pavelsavara merged 24 commits intodotnet:mainfrom
pavelsavara:browser_MetricsHandler_optional
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disable/trim MetricsHandler when System.Diagnostics.Metrics.Meter.IsSupported is false#114326
pavelsavara merged 24 commits intodotnet:mainfrom
pavelsavara:browser_MetricsHandler_optional

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@pavelsavara pavelsavara commented Apr 7, 2025 •
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  • use System.Diagnostics.Metrics.Meter.IsSupported to disable/trim MetricsHandler
  • use System.Net.Http.EnableActivityPropagation to disable/trim DiagnosticsHandler

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- rebase
4b531b1 
- use System.Diagnostics.Metrics.Meter.IsSupported
- call EventSource.EnableActivityTracker() when DiagnosticsHandler is enabled
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@pavelsavara pavelsavara added this to the 10.0.0 milestone Apr 7, 2025
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ManickaP commented Apr 7, 2025

cc @antonfirsov

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@pavelsavara pavelsavara marked this pull request as ready for review April 7, 2025 15:11
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Copilot reviewed 11 out of 15 changed files in this pull request and generated 2 comments.

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  • src/libraries/System.Net.Http/src/ILLink/ILLink.Substitutions.xml: Language not supported
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  • src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Descriptors.EventSource.xml: Language not supported
  • src/mono/sample/wasm/browser-advanced/Wasm.Advanced.Sample.csproj: Language not supported

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LGTM!

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Does the PR ensure that the SocketsHttpHandlerMetrics and the ConnectionMetrics types are also trimmed away when metrics are disabled?

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pavelsavara commented Apr 11, 2025 •
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I added tests. Trimming doesn't work. The constant is not being propagated. I don't know why.

Fixed. It works when there are no indirections between the trimmed property and methods that use them

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Merge branch 'main' into browser_MetricsHandler_optional
89a764a 
# Conflicts:
#	src/libraries/System.Net.Http/src/System/Net/Http/GlobalHttpSettings.cs
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LGTM modulo small suggestion. Thanks!

Edit: Just noticed MetricsHandlerTrimmedTest.cs is failing, will check this again after the fix.

pavelsavara and others added 2 commits April 15, 2025 08:18
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Update src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpH…
900f62f 
…andler/ConnectionPool/HttpConnectionWaiter.cs

Co-authored-by: Anton Firszov <[email protected]>
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@pavelsavara pavelsavara merged commit d0e6ce8 into dotnet:main Apr 15, 2025
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@pavelsavara pavelsavara deleted the browser_MetricsHandler_optional branch April 15, 2025 12:07
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