Remove <Optimize>True</Optimize> from src/tests/async project files

[Copilot]

Removes <Optimize>True</Optimize> from all .csproj files under src/tests/async, along with any <PropertyGroup> elements left empty after removal.

Changes

• 31 files: Removed entire <PropertyGroup> block (contained only <Optimize>True</Optimize>)
• 11 files: Removed <Optimize>True</Optimize> line only, preserving other properties (CLRTestKind, RequiresProcessIsolation, DefineConstants, etc.)

Before:

<Project Sdk="Microsoft.NET.Sdk.IL">
  <PropertyGroup>
    <Optimize>True</Optimize>
  </PropertyGroup>
  <ItemGroup>
    <Compile Include="$(MSBuildProjectName).cs" />
  </ItemGroup>
</Project>

After:

<Project Sdk="Microsoft.NET.Sdk.IL">
  <ItemGroup>
    <Compile Include="$(MSBuildProjectName).cs" />
  </ItemGroup>
</Project>

Original prompt

remove <Optimize>True</Optimize> from all project files under src/tests/async. Also remove any empty <PropertyGroup> that are left in the project file after removing the Optimize tag

---

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[MichalStrehovsky]

/azp run runtime-nativeaot-outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Copilot]

Pull request overview

This PR removes redundant <Optimize>True</Optimize> settings from 42 async test project files, relying instead on the default optimization configuration already defined in the parent Directory.Build.props which sets optimization based on the build configuration (Debug, Release, or Checked).

• Removes explicit optimization overrides that duplicated parent configuration
• Cleans up empty <PropertyGroup> elements left after removal
• Standardizes project file structure across async tests

Reviewed changes

Copilot reviewed 42 out of 42 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
without-yields/without-yields.csproj	Removed entire PropertyGroup containing only Optimize setting
with-yields/with-yields.csproj	Removed entire PropertyGroup containing only Optimize setting
widening-tailcall/widening-tailcall.csproj	Removed entire PropertyGroup containing only Optimize setting
void/void.csproj	Removed entire PropertyGroup containing only Optimize setting
varying-yields/varying-yields.csproj	Removed entire PropertyGroup containing only Optimize setting
varying-yields/varying-yields-valuetask.csproj	Removed Optimize setting, preserved DefineConstants
varying-yields/varying-yields-task.csproj	Removed Optimize setting, preserved DefineConstants
valuetaskbased-asyncfibonacci-without-yields/valuetaskbased-asyncfibonacci-without-yields.csproj	Removed Optimize setting, preserved CLRTestKind
valuetaskbased-asyncfibonacci-with-yields/valuetaskbased-asyncfibonacci-with-yields.csproj	Removed Optimize setting, preserved CLRTestKind
valuetask/valuetask.csproj	Removed entire PropertyGroup containing only Optimize setting
valuetask-source/valuetask-source.csproj	Removed Optimize setting, preserved RequiresProcessIsolation
taskbased-asyncfibonacci-without-yields/taskbased-asyncfibonacci-without-yields.csproj	Removed Optimize setting, preserved CLRTestKind
taskbased-asyncfibonacci-with-yields/taskbased-asyncfibonacci-with-yields.csproj	Removed Optimize setting, preserved CLRTestKind
synchronization-context/synchronization-context.csproj	Removed entire PropertyGroup containing only Optimize setting
syncfibonacci-without-yields/syncfibonacci-without-yields.csproj	Removed Optimize setting, preserved CLRTestKind
struct/struct.csproj	Removed entire PropertyGroup containing only Optimize setting
strength-reduction/strength-reduction.csproj	Removed entire PropertyGroup containing only Optimize setting
small/small.csproj	Removed entire PropertyGroup containing only Optimize setting
simple-eh/simple-eh.csproj	Removed entire PropertyGroup containing only Optimize setting
shared-generic/shared-generic.csproj	Removed entire PropertyGroup containing only Optimize setting
returns/returns.csproj	Removed entire PropertyGroup containing only Optimize setting
reflection/reflection-simple.csproj	Removed entire PropertyGroup containing only Optimize setting
pinvoke/pinvoke.csproj	Removed entire PropertyGroup containing only Optimize setting
pgo/pgo.csproj	Removed entire PropertyGroup containing only Optimize setting
override/override.csproj	Removed entire PropertyGroup containing only Optimize setting
objects-captured/objects-captured.csproj	Removed entire PropertyGroup containing only Optimize setting
object/object.csproj	Removed entire PropertyGroup containing only Optimize setting
mincallcost-microbench/mincallcost-microbench.csproj	Removed Optimize setting, preserved CLRTestKind
inst-unbox-thunks/inst-unbox-thunks.csproj	Removed entire PropertyGroup containing only Optimize setting
implement/implement.csproj	Removed entire PropertyGroup containing only Optimize setting
gc-roots-scan/gc-roots-scan.csproj	Removed Optimize setting, preserved CLRTestKind
fibonacci-without-yields/fibonacci-without-yields.csproj	Removed entire PropertyGroup containing only Optimize setting
fibonacci-without-yields-config-await/fibonacci-without-yields-config-await.csproj	Removed entire PropertyGroup containing only Optimize setting
fibonacci-with-yields/fibonacci-with-yields.csproj	Removed entire PropertyGroup containing only Optimize setting
fibonacci-with-yields-struct-return/fibonacci-with-yields-struct-return.csproj	Removed entire PropertyGroup containing only Optimize setting
execution-context/execution-context.csproj	Removed entire PropertyGroup containing only Optimize setting
eh-microbench/eh-microbench.csproj	Removed Optimize setting, preserved CLRTestKind
cse-array-index-byref/cse-array-index-byref.csproj	Removed entire PropertyGroup containing only Optimize setting
collectible-alc/collectible-alc.csproj	Removed Optimize setting, preserved RequiresProcessIsolation
cancellation/cancellation.csproj	Removed entire PropertyGroup containing only Optimize setting
byref-param/byref-param.csproj	Removed entire PropertyGroup containing only Optimize setting
awaitingnotasync/awaitingnotasync.csproj	Removed entire PropertyGroup containing only Optimize setting

---

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[jakobbotsch]

Does this change anything for coreclr testing? Do we now compile these unoptimized in any PR runs? (It would be unfortunate to do that – many of these tests are quite long running in debug.)

What is the NativeAOT behavior that is being tested here when the assemblies are unoptimized?

Note that we end up testing both the unoptimized and optimized JIT compilations of these tests because of tiered compilation. If the assemblies are compiled unoptimized they will only test unoptimized codegen.

[MichalStrehovsky]

Does this change anything for coreclr testing? Do we now compile these unoptimized in any PR runs? (It would be unfortunate to do that – many of these tests are quite long running in debug.)

CoreCLR testing uses the IL that is the result of the "Build coreclr Common Pri0 Test Build AnyOS AnyCPU checked" leg. We only build the test tree once and the configuration is Checked (i.e. optimized, DEBUG defined). So this should have no effect on CoreCLR testing (I think we have a test gap that we never test without C# compiler optimizations lots of tests in the src/tests tree since only the JIT subtree does the _r.cspro/_ro.csproj/_d.csproj split)

What is the NativeAOT behavior that is being tested here when the assemblies are unoptimized?

Native AOT compilation picks up the value for optimization setting from the entrypoint assembly Optimization flag. When the entrypoint assembly Optimization flag is set to true, we compile with codegen optimizations and whole program optimizations. E.g. a test testing virtual method calls would have all of the virtual method calls devirtualized and possibly even inlined, not actually testing virtual call behaviors (in the spirit).

Native AOT testing builds the test tree in both debug and release to get the full coverage. We don't have Tier-0 to simulate unoptimized. If test forces itself to be optimized, we never test/execute unoptimized code for it.

[jakobbotsch]

Seems reasonable given the above explanation then.

You might want to double check if the time it takes to run the tests in debug is acceptable. @davidwrighton identified the slow tests in #121862 and we should perhaps just decrease their number of iterations always.

[MichalStrehovsky]

You might want to double check if the time it takes to run the tests in debug is acceptable. @davidwrighton identified the slow tests in #121862 and we should perhaps just decrease their number of iterations always.

Checked run of the async tree: Time Elapsed 00:00:33.87
Debug run of the async tree: Time Elapsed 00:00:37.54

[MichalStrehovsky]

/ba-g timeouts in legs that are not related