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Optimize HashSet.UnionWith to copy data from another HashSet when empty #122952

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Merged
stephentoub merged 4 commits into from
Jan 12, 2026
+52 −0

Refactor UnionWith test to use MemberData with foreach loops

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Merged

Optimize HashSet.UnionWith to copy data from another HashSet when empty #122952

Refactor UnionWith test to use MemberData with foreach loops
78138af
Select commit
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Azure Pipelines / runtime (Build ios-arm64 Release AllSubsets_NativeAOT_Smoke) failed Jan 8, 2026 in 2h 50m 28s

Build ios-arm64 Release AllSubsets_NativeAOT_Smoke failed

3 errors / 0 warnings

Annotations

Check failure on line 91 in .packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets

See this annotation in the file changed.

@azure-pipelines azure-pipelines / runtime (Build ios-arm64 Release AllSubsets_NativeAOT_Smoke)

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets#L91 

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets(91,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Work item iOS.Device.Aot.Test in job e7deba14-9bce-4115-9594-c6b83250cc2a has failed.
Failure log: https://helix.dot.net/api/2019-06-17/jobs/e7deba14-9bce-4115-9594-c6b83250cc2a/workitems/iOS.Device.Aot.Test/console

Check failure on line 91 in .packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets

See this annotation in the file changed.

@azure-pipelines azure-pipelines / runtime (Build ios-arm64 Release AllSubsets_NativeAOT_Smoke)

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets#L91 

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets(91,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Work item iOS.Device.ExportManagedSymbols.Test in job e7deba14-9bce-4115-9594-c6b83250cc2a has failed.
Failure log: https://helix.dot.net/api/2019-06-17/jobs/e7deba14-9bce-4115-9594-c6b83250cc2a/workitems/iOS.Device.ExportManagedSymbols.Test/console

Check failure on line 91 in .packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets

See this annotation in the file changed.

@azure-pipelines azure-pipelines / runtime (Build ios-arm64 Release AllSubsets_NativeAOT_Smoke)

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets#L91 

.packages/microsoft.dotnet.helix.sdk/11.0.0-beta.25619.109/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets(91,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Work item iOS.Device.ParallelForEachAsync.Test in job e7deba14-9bce-4115-9594-c6b83250cc2a has failed.
Failure log: https://helix.dot.net/api/2019-06-17/jobs/e7deba14-9bce-4115-9594-c6b83250cc2a/workitems/iOS.Device.ParallelForEachAsync.Test/console
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