Add support for parallel build in VS

[KevinRansom]

Originally opened on CodePlex byVaskir

Before I installed Daily Builds Preview 12-01-2014 my largdoee solution (~180 projects, ~80 of which are F# ones) was built in about 3 minutes. Now it's built in about 10 minutes.

I looked at fsc.exe processes in Task manager and I didn't see more than one of them at a moment.
I have set number of parallel builds to 8 in VS settings. It seems that parallel build is broken in the latest Preview.

Edit (latkin)
This is longstanding behavior and expected, it is not a regression/break. Updating the bug to reflect >this as a feature request for supporting parallel build.

comments
latkin wrote Dec 2, 2014 at 11:19 AM [x]
Can you share your large solution?

vaskir wrote Dec 2, 2014 at 12:04 PM [x]
Unfortunately, I cannot.

pavelhritonenko wrote Dec 9, 2014 at 3:46 AM [x]
Latest release have same issue

latkin wrote Dec 17, 2014 at 12:14 PM [x]
Interesting, I am having trouble reproducing this. Rather, I am not seeing even older versions do parallel build. Can someone positively confirm on an older release that multiple fsc.exe processes are fanned out with a multi-project solution?
Installing a new preview might cause a slowdown because binaries are not yet ngen'ed.... Does running "ngen executeQueuedItems" form admin prompt help here?

vaskir wrote Dec 17, 2014 at 11:38 PM [x]
OK, so it's not the latest preview issue.
Maybe it's better to close this issue and open a new one, something like "parallel build has never worked"?

KevinRansom wrote Dec 18, 2014 at 1:41 AM [x]
Updated the title to:
Parallel build does not work when building multiple F# projects with the IDE

vaskir wrote Dec 19, 2014 at 4:37 AM [x]
I've compared time needed to rebuild by solution:
Visual Studio: 00:04:18
FAKE: 00:01:47
FAKE was loading 4-core i7 CPU at 100% most of the time (wow).
So, parallel build in VS could make building solutions containing many F# projects almost 2.5x faster.

[vasily-kirichenko]

Any plans to implement this? Is it a fundamental F# project system limitation?

[latkin]

I took a look when it was first discussed, but it's not a totally simple change (that I can tell). Seems to require refactorings to track when msbuild should be in-proc (e.g. for design-time build/compilation that powers editor features) and when it should be out-of-proc (e.g. for full build), and various plumbing to wire those decisions back to the platform.

We aren't actively looking at it, but it would be great if someone wants to dig in an submit a PR.

[rojepp]

@latkin Can you share any more hints? Why wouldn't you want to build in parallel for design-time?

[vasily-kirichenko]

@latkin I tried to find any place where the build is launched and failed. Could you point me where to look?

/cc @dsyme

[vasily-kirichenko]

@latkin @KevinRansom Do I understand correctly that this feature should be implemented in fsharp4 branch?

[latkin]

@vasily-kirichenko project system DoMSBuildSubmission looks like a credible place to start

Yes, fsharp4 would be the proper branch

[dsyme]

While chatting with @vasily-kirichenko I poked around the MSbuild and Visual F# Tools source to look where the max processor count for the build gets set

It seems to we ultimately need to get the maxNodesCount on the ProjectCollection set, e.g. see the constructor for the ProjectCollection type in MSBuild

The relevant ProjectCollection object that governs the Visual F# Tools build is accessed here (in the method that @latkin refers to above): https://github.com/Microsoft/visualfsharp/blob/fsharp4/vsintegration/src/vs/FsPkgs/FSharp.Project/Common.Source.CSharp/Project/ProjectNode.cs#L3599

For the current Visual F# Tools, this always seems to be the GlobalProjectCollection, e.g. see https://github.com/Microsoft/visualfsharp/blob/275b832e9dd1a4bd64ed3accd218384b901be1d2/vsintegration/src/vs/FsPkgs/FSharp.Project/Common.Source.CSharp/Project/Utilities.cs#L742 (though that should certainly be double checked as I'm only saying that based on a few github searches)

Its possible that stopping using GlobalProjectCollection and instead creating a single new ProjectCollection with MaxNodesCOunt = Environment.GetProcessorCount() would help?

[vasily-kirichenko]

Unfortunately, there is not any Node related property in ProjectCollection:

About https://github.com/Microsoft/visualfsharp/blob/fsharp4/vsintegration/src/vs/FsPkgs/FSharp.Project/Common.Source.CSharp/Project/ProjectNode.cs#L3599, it seems it's for setting where the node should be built - in-proc, externally or either, see https://msdn.microsoft.com/en-us/library/vstudio/microsoft.build.execution.nodeaffinity(v=vs.110).aspx

Current status:

• VS always tries to build projects in solution in parallel
• Visual F# Tools intentionally restrict parallelism
• We have not found the place where it's happening

[vladima]

I vaguely recall our experiments with this...

[vasily-kirichenko]

@vladima just created that registry key, then devenv /setup. No difference, parallel build is not enabled.

[vasily-kirichenko]

After I changed the code here https://github.com/Microsoft/visualfsharp/blob/fsharp4/vsintegration/src/vs/FsPkgs/FSharp.Project/Common.Source.CSharp/Project/ProjectConfig.cs#L1781 as following

public int GetBuildCfgProperty(int propid, out object pvar)
        {
            switch (propid)
            {
                case VSBLDCFGPROPID_SupportsMTBuild:
                    // Indicate that we support multi-proc builds

// HERE
                    pvar = true; // IsMultiThreadedBuildEnabled();


                    return VSConstants.S_OK;
                default:
                    pvar = null;
                    return VSConstants.E_NOTIMPL;
            }
        }

And install VS integration as described here https://github.com/Microsoft/visualfsharp/blob/fsharp4/DEVGUIDE.md it seemed to run up to 4 FSC.exe on my 4-core machine simultaneously (!!!) But compilation always failed with

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'FSharp.Core, Version=4.4.0.9055, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.  

Full log:

All packages are already installed and there is nothing to restore.
NuGet package restore finished.
1>------ Build started: Project: AsyncOverhead, Configuration: Release Any CPU ------
1>Target "_CheckForInvalidConfigurationAndPlatform" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (entry point):
1>Target "BeforeBuild" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "Build" depends on it):
1>Target "BuildOnlySettings" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreBuild" depends on it):
1>Target "GetFrameworkPaths" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.NetFramework.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareForBuild" depends on it):
1>Target "GetReferenceAssemblyPaths" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareForBuild" depends on it):
1>Target "PrepareForBuild" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreBuild" depends on it):
1>Target "BeforeResolveReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>Target "AssignProjectConfiguration" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>Target "_SplitProjectReferencesByFileExistence" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveProjectReferences" depends on it):
1>Target "ResolveProjectReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>  Target "GetTargetPath" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac.Platform.Net\Hopac.Platform.Net.fsproj" (entry point):
1>  Target "GetTargetPath" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac\Hopac.fsproj" (entry point):
1>  Target "_CheckForInvalidConfigurationAndPlatform" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac.Core\Hopac.Core.csproj" (entry point):
1>  Target "_CheckForInvalidTargetFrameworkProfile" in file "C:\Program Files (x86)\MSBuild\Microsoft\Portable\Microsoft.Portable.Core.targets" from project "C:\git\Hopac\Libs\Hopac.Core\Hopac.Core.csproj" (entry point):
1>  Target "GetTargetPath" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac.Core\Hopac.Core.csproj" (entry point):
1>  Target "GetNativeManifest" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac.Platform.Net\Hopac.Platform.Net.fsproj" (entry point):
1>  Target "GetNativeManifest" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac.Core\Hopac.Core.csproj" (entry point):
1>  Target "GetNativeManifest" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Libs\Hopac\Hopac.fsproj" (entry point):
1>Target "GetInstalledSDKLocations" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveSDKReferences" depends on it):
1>Target "ResolveSDKReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveAssemblyReferences" depends on it):
1>Target "ExpandSDKReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveAssemblyReferences" depends on it):
1>Target "ResolveAssemblyReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>Target "AfterResolveReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>Target "ImplicitlyExpandDesignTimeFacades" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.NetFramework.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResolveReferences" depends on it):
1>Target "ResolveReferences" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreBuild" depends on it):
1>Target "ValidationExtension" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.WorkflowBuildExtensions.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "ExpressionBuildExtension" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.WorkflowBuildExtensions.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "AfterMarkupCompilePass1" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.WinFx.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "FileClassification" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.WinFx.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "AssignTargetPaths" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResourceNames" depends on it):
1>Target "SplitResourcesByCulture" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResourceNames" depends on it):
1>Target "CreateCustomManifestResourceNames" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResourceNames" depends on it):
1>Target "PrepareResourceNames" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "BeforeResGen" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResGen" depends on it):
1>Target "CoreResGen" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResGen" depends on it):
1>Target "AfterResGen" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "ResGen" depends on it):
1>Target "ResGen" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "PrepareRdlFiles" in file "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\ReportingServices\Microsoft.ReportingServices.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CompileRdlFiles" depends on it):
1>Target "CompileRdlFiles" in file "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\ReportingServices\Microsoft.ReportingServices.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "PrepareResources" depends on it):
1>Target "PrepareResources" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreBuild" depends on it):
1>Target "_SetEmbeddedWin32ManifestProperties" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "SetWin32ManifestProperties" depends on it):
1>Target "SetWin32ManifestProperties" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "Compile" depends on it):
1>Target "_GenerateCompileInputs" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "Compile" depends on it):
1>Target "GenerateTargetFrameworkMonikerAttribute" in file "C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\Microsoft.FSharp.Targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "BeforeCompile" depends on it):
1>  Skipping target "GenerateTargetFrameworkMonikerAttribute" because all output files are up-to-date with respect to the input files.
1>Target "BeforeCompile" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "Compile" depends on it):
1>Target "DesignTimeXamlMarkupCompilation" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Xaml.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreCompile" depends on it):
1>Target "DesignTimeMarkupCompilation" in file "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.WinFx.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreCompile" depends on it):
1>Target "CoreCompile" in file "C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\Microsoft.FSharp.Targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "Compile" depends on it):
1>  C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\fsc.exe -o:obj\Release\AsyncOverhead.exe --debug:pdbonly --noframework --doc:bin\Release\AsyncOverhead.XML --optimize+ --platform:anycpu -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\FSharp\.NETFramework\v4.0\4.3.1.0\FSharp.Core.dll" -r:C:\git\Hopac\Libs\Hopac.Core\bin\Release\Hopac.Core.dll -r:C:\git\Hopac\Libs\Hopac\bin\Release\Hopac.dll -r:C:\git\Hopac\Libs\Hopac.Platform.Net\bin\Release\Hopac.Platform.dll -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\mscorlib.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Core.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\System.Numerics.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Collections.Concurrent.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Collections.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ComponentModel.Annotations.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ComponentModel.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ComponentModel.EventBasedAsync.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Diagnostics.Contracts.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Diagnostics.Debug.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Diagnostics.Tools.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Diagnostics.Tracing.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Dynamic.Runtime.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Globalization.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.IO.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Linq.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Linq.Expressions.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Linq.Parallel.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Linq.Queryable.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Net.NetworkInformation.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Net.Primitives.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Net.Requests.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ObjectModel.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.Emit.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.Emit.ILGeneration.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.Emit.Lightweight.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.Extensions.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Reflection.Primitives.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Resources.ResourceManager.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.Extensions.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.InteropServices.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.InteropServices.WindowsRuntime.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.Numerics.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.Serialization.Json.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.Serialization.Primitives.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Runtime.Serialization.Xml.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Security.Principal.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ServiceModel.Duplex.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ServiceModel.Http.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ServiceModel.NetTcp.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ServiceModel.Primitives.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.ServiceModel.Security.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Text.Encoding.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Text.Encoding.Extensions.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Text.RegularExpressions.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Threading.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Threading.Tasks.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Threading.Tasks.Parallel.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Xml.ReaderWriter.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Xml.XDocument.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\Facades\System.Xml.XmlSerializer.dll" --target:exe --warn:4 --warnaserror --warnaserror:76 --vserrors --validate-type-providers --LCID:1033 --utf8output --fullpaths --flaterrors --subsystemversion:6.00 --highentropyva+ --sqmsessionguid:80a5109a-1cc2-449c-879a-6de3cb797e82 --warnon:1182 "C:\Users\Vasily\AppData\Local\Temp\.NETFramework,Version=v4.5.AssemblyAttributes.fs" AsyncOverhead.fs 
1>  Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'FSharp.Core, Version=4.4.0.9055, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
1>     at Microsoft.FSharp.Compiler.CommandLineMain.main(String[] argv)
1>C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\Microsoft.FSharp.Targets(155,9): error MSB6006: "fsc.exe" exited with code -532462766.
1>Target "_CheckForCompileOutputs" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "_CleanGetCurrentAndPriorFileWrites" depends on it):
1>Target "_CleanGetCurrentAndPriorFileWrites" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "_CleanRecordFileWrites" depends on it):
1>Target "_CleanRecordFileWrites" in file "C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets" from project "C:\git\Hopac\Benchmarks\AsyncOverhead\AsyncOverhead.fsproj" (target "CoreBuild" depends on it):
1>Done building project "AsyncOverhead.fsproj" -- FAILED.
1>
1>Build FAILED.
========== Build: 0 succeeded, 1 failed, 3 up-to-date, 0 skipped ==========

[vasily-kirichenko]

@KevinRansom @latkin can you help with this error? Or maybe it'd easier and faster if you made that little change and test it ourselves? Thanks.

[vasily-kirichenko]

I've resolved the issue by running update.cmd release -ngen. Everything works perfectly ok. Coool!

Hopac solution rebuild (it contains of 19 projects, most of which are very small and do not depend on each other):

• "maximum number of parallel build projects" = 1 => 29 seconds
• ... = 4 => 18 seconds

FSharp.Data: 20 seconds => 16 seconds (it contains only 3 projects).

[forki]

So you found the issue? Can you send a pr with a fix? Would be so cool to
have it.
On Jun 7, 2015 4:08 PM, "Vasily Kirichenko" notifications@github.com
wrote:

I've resolved the issue by running update.cmd release -ngen. Everything
works perfectly ok. Coool!

Hopac solution rebuild (it contains of 19 projects, most of which very
small and do not depend on each other):

• "maximum number of parallel build projects" = 1 => 29 seconds
• ... = 4 => 18 seconds

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