Enable runtime-async for System.IO.Compression, System.IO.Compression.Brotli, and System.Net.WebSockets#124397

Copilot · 2026-02-13T18:44:01Z

Description

Enables the runtime-async compiler feature on the System.IO.Compression, System.IO.Compression.Brotli, and System.Net.WebSockets source libraries to allow performance testing of runtime-async with compression and WebSocket workloads.

Adds <Features>$(Features);runtime-async=on</Features> with NoWarn CA2252 suppression to all three library csproj files
Guards enablement with conditions matching eng/testing/tests.targets: excluded for browser, wasi, and Mono targets where runtime-async is unsupported
Uses NoWarn CA2252 instead of EnablePreviewFeatures to avoid propagating [assembly: RequiresPreviewFeatures] to downstream type-forwarding shim assemblies (e.g., the System shim)

All existing tests pass (1400 System.IO.Compression, 328 Brotli, 570 System.Net.WebSockets). Full clr+libs build succeeds with 0 warnings and 0 errors.

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…ion.Brotli Co-authored-by: agocke <515774+agocke@users.noreply.github.com>

agocke · 2026-02-13T19:33:42Z

/benchmark

pr-benchmarks · 2026-02-13T19:34:01Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-ampere: Ampere/Linux 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T19:45:53Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation
httpclient: HttpClient Benchmark (change HTTP version by adding e.g. --variable httpVersion=3.0; change response size by adding e.g. --variable responseSize=256; default: HTTP/1.1 GET 8K)

Profiles:

aspnet-perf-win: Intel/Windows 12 Cores
aspnet-citrine-win: Intel/Windows 28 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T19:46:03Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-win-ampere: Ampere/Windows 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

agocke · 2026-02-13T20:08:11Z

/benchmark micro

pr-benchmarks · 2026-02-13T20:11:03Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation
httpclient: HttpClient Benchmark (change HTTP version by adding e.g. --variable httpVersion=3.0; change response size by adding e.g. --variable responseSize=256; default: HTTP/1.1 GET 8K)

Profiles:

aspnet-perf-win: Intel/Windows 12 Cores
aspnet-citrine-win: Intel/Windows 28 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:11:13Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-win-ampere: Ampere/Windows 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:14:26Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation
httpclient: HttpClient Benchmark (change HTTP version by adding e.g. --variable httpVersion=3.0; change response size by adding e.g. --variable responseSize=256; default: HTTP/1.1 GET 8K)

Profiles:

aspnet-citrine-lin: Intel/Linux 28 Cores
aspnet-perf-lin: Intel/Linux 12 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:14:33Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-ampere: Ampere/Linux 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

agocke · 2026-02-13T20:15:53Z

/benchmark micro libs

pr-benchmarks · 2026-02-13T20:33:27Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation
httpclient: HttpClient Benchmark (change HTTP version by adding e.g. --variable httpVersion=3.0; change response size by adding e.g. --variable responseSize=256; default: HTTP/1.1 GET 8K)

Profiles:

aspnet-citrine-lin: Intel/Linux 28 Cores
aspnet-perf-lin: Intel/Linux 12 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:33:35Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-ampere: Ampere/Linux 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:43:58Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation
httpclient: HttpClient Benchmark (change HTTP version by adding e.g. --variable httpVersion=3.0; change response size by adding e.g. --variable responseSize=256; default: HTTP/1.1 GET 8K)

Profiles:

aspnet-perf-win: Intel/Windows 12 Cores
aspnet-citrine-win: Intel/Windows 28 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

pr-benchmarks · 2026-02-13T20:44:07Z

Crank Pull Request Bot

/benchmark <benchmark[,...]> <profile[,...]> <component,[...]> <arguments>

Benchmarks:

micro: .NET Performance micro benchmarks (set filter by adding --variable filter=...; by default filter=*LinqBenchmarks*)
plaintext: TechEmpower Plaintext Scenario - ASP.NET Platform implementation
json: TechEmpower JSON Scenario - ASP.NET Platform implementation
fortunes: TechEmpower Fortunes Scenario - ASP.NET Platform implementation
fortunes_ef: TechEmpower Fortunes Scenario with EF Core - ASP.NET Platform implementation

Profiles:

aspnet-citrine-win-ampere: Ampere/Windows 80 Cores

Components:

runtime
libs

Arguments: any additional arguments to pass through to crank, e.g. --variable name=value

agocke · 2026-02-13T23:04:32Z

/benchmark micro aspnet-perf-lin libs

pr-benchmarks · 2026-02-13T23:13:59Z

Benchmark started for micro on aspnet-perf-lin with libs. Logs: link

pr-benchmarks · 2026-02-13T23:16:43Z

An error occurred, please check the logs

agocke · 2026-02-13T23:46:26Z

@copilot please also enable preview features for System.Net.WebSockets

…ropagation for all three libraries Co-authored-by: agocke <515774+agocke@users.noreply.github.com>

Copilot · 2026-02-14T00:22:10Z

@copilot please also enable preview features for System.Net.WebSockets

Done in 06236ed. Also fixed all three libraries to use NoWarn CA2252 instead of EnablePreviewFeatures — the latter was generating [assembly: RequiresPreviewFeatures] which broke the System type-forwarding shim. All 570 WebSockets tests pass.

agocke · 2026-02-17T19:03:37Z

/benchmark micro aspnet-perf-lin libs

pr-benchmarks · 2026-02-17T19:19:34Z

Benchmark started for micro on aspnet-perf-lin with libs. Logs: link

pr-benchmarks · 2026-02-17T19:22:19Z

An error occurred, please check the logs

iremyux · 2026-02-19T14:19:48Z

Hey @agocke , we triaged this inside the team because it got labeled System.IO.Compression. But it seems like it's mislabeled, can you please change it to something more suitable?

agocke · 2026-02-19T17:34:59Z

@DrewScoggins am I doing something wrong with the benchmarking here? It seems like this should work, but I can’t see the results and these errors don’t make sense

agocke · 2026-02-19T17:35:45Z

@iremyux this is a draft pr, we can leave it untriaged

DrewScoggins · 2026-02-19T19:37:55Z

Took a look, and the issue is that an environment variable is not being set properly, and we try to restore for older TFMs. Taking a step back, this feature was written by Sebestian, and we don't use it or really maintain it. I am going to spend some time today to look at this feature and get it working again, as well as understand what and how it works.

dotnet-policy-service · 2026-02-20T08:41:14Z

Tagging subscribers to this area: @agocke
See info in area-owners.md if you want to be subscribed.

Initial plan

610dfe0

Copilot AI assigned Copilot and agocke Feb 13, 2026

github-project-automation bot added this to AppModel Feb 13, 2026

Copilot started work on behalf of agocke February 13, 2026 18:44 View session

jkotas added the runtime-async label Feb 13, 2026

github-actions bot added the needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners label Feb 13, 2026

Enable runtime-async for System.IO.Compression and System.IO.Compress…

22e14cf

…ion.Brotli Co-authored-by: agocke <515774+agocke@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Enable runtime async for System.Compression performance testing~~ Enable runtime-async for System.IO.Compression and System.IO.Compression.Brotli Feb 13, 2026

Copilot AI requested a review from agocke February 13, 2026 19:17

Copilot finished work on behalf of agocke February 13, 2026 19:17

github-actions bot added area-System.IO.Compression and removed needs-area-label An area label is needed to ensure this gets routed to the appropriate area owners labels Feb 13, 2026

Copilot AI mentioned this pull request Feb 13, 2026

[WIP] Open new version of PR with applied feedback #124406

Closed

5 tasks

Copilot started work on behalf of agocke February 13, 2026 23:46 View session

Enable runtime-async for System.Net.WebSockets; fix preview feature p…

06236ed

…ropagation for all three libraries Co-authored-by: agocke <515774+agocke@users.noreply.github.com>

Copilot AI changed the title ~~Enable runtime-async for System.IO.Compression and System.IO.Compression.Brotli~~ Enable runtime-async for System.IO.Compression, System.IO.Compression.Brotli, and System.Net.WebSockets Feb 14, 2026

Copilot finished work on behalf of agocke February 14, 2026 00:22

build-analysis bot mentioned this pull request Feb 14, 2026

Sometimes the helix SDK uses GetWorkItemsAsync when workitems aren't done processing. dotnet/dnceng#6011

Open

3 tasks

iremyux removed the area-System.IO.Compression label Feb 19, 2026

github-actions bot added the area-System.IO.Compression label Feb 19, 2026

rzikm added area-VM-coreclr and removed area-System.IO.Compression labels Feb 20, 2026

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