Slow app build - Xamarin for Visual Studio
The build/deploy of my Xamarin.Android app is painfully slow these days. I cannot remember it being this slow before.
I have enabled:
- Use shared runtime
-
Although this is a very "tough" question to answer as build times can be dependent on many different factors, I can walk you through ways to determine what in your build is causing the delay. In most cases it's typically because of non-optimized
Resources. This can be resources like raw images/audio/video that really should be optimized for mobile.As for the experimental functionality you mentioned, you can view the release notes here:
https://developer.xamarin.com/releases/android/xamarin.android_7/xamarin.android_7.0/#Improved_Fast_Deployment
Note: This is experimental, thus it does not guarantee it will be stable enough to use in production.
As for Build Times, we need to know where the bottleneck is within your project. To do this, you need to enable
Diagnostic Build Outputin your build-agent's command. This is pretty simple withMSBuildvia:/v:diagor/verbosity:diagnostic(Or whatever combination you wanted)and
/clp:PerformanceSummary- Which will tell use the performance timings of each taskhttps://msdn.microsoft.com/en-us/library/ms164311.aspx
EX: Building a File->New Android Project:
1>Project Performance Summary: 1> 4087 ms c:\users\dougl\documents\visual studio 2015\Projects\App26\App26\App26.csproj 1 calls 1> 4087 ms Rebuild 1 calls 1> 1>Target Performance Summary: 1> 0 ms GetCopyToOutputDirectoryXamlAppDefs 1 calls 1> 0 ms BeforeRebuild 1 calls 1> 0 ms PrepareResources 1 calls 1> 0 ms _DefineBuildTargetAbis 1 calls 1> 0 ms UpdateAndroidAssets 1 calls 1> 0 ms AfterBuild 1 calls 1> 0 ms AfterCompile 1 calls 1> 0 ms BeforeCompile 1 calls 1> 0 ms ExpressionBuildExtension 1 calls 1> 0 ms _GenerateCompileInputs 1 calls 1> 0 ms ResolveCodeAnalysisRuleSet 1 calls 1> 0 ms _LinkAssemblies 1 calls 1> 0 ms GetTargetPath 1 calls 1> 0 ms Build 1 calls 1> 0 ms GenerateCompiledExpressionsTempFile 1 calls 1> 0 ms _CopyConfigFiles 1 calls 1> 0 ms Compile 1 calls 1> 0 ms Rebuild 1 calls 1> 0 ms ModifyUnitTestPlatformVersion 1 calls 1> 0 ms _RegisterMdbFilesWithFileWrites 1 calls 1> 0 ms _CheckForCompileOutputs 1 calls 1> 0 ms _SetupDesignTimeBuildForIntellisense 1 calls 1> 0 ms _SetTargetFrameworkMonikerAttribute 1 calls 1> 0 ms _GenerateAndroidAssetsDir 1 calls 1> 0 ms _AddMultiDexDependencyJars 1 calls 1> 0 ms AfterResolveReferences 1 calls 1> 0 ms UpdateAndroidResources 1 calls 1> 0 ms _CheckInstantRunCondition 1 calls 1> 0 ms CleanPublishFolder 1 calls 1> 0 ms _CheckTargetFramework 1 calls 1> 0 ms _CollectMonoAndroidOutputs 1 calls 1> 0 ms _CopySourceItemsToOutputDirectory 1 calls 1> 0 ms CompileRdlFiles 1 calls 1> 0 ms _CreateAdditionalResourceCache 4 calls 1> 0 ms DesignTimeXamlMarkupCompilation 1 calls 1> 0 ms AfterRebuild 1 calls 1> 0 ms _SeparateAppExtensionReferences 1 calls 1> 0 ms ExpandSDKReferences 1 calls 1> 0 ms _ReadPropertiesCache 1 calls 1> 0 ms AfterResGen 1 calls 1> 0 ms CleanReferencedProjects 1 calls 1> 0 ms _CollectPCLPdbFiles 1 calls 1> 0 ms Clean 1 calls 1> 0 ms SetWin32ManifestProperties 1 calls 1> 0 ms ResolveSDKReferences 1 calls 1> 0 ms CreateSatelliteAssemblies 1 calls 1> 0 ms DeleteBuildInfoResource 1 calls 1> 0 ms _ResolveMonoAndroidFramework 1 calls 1> 0 ms PrepareResourceNames 1 calls 1> 0 ms _SetupInstantRun 1 calls 1> 0 ms _SetupDesignTimeBuildForBuild 1 calls 1> 0 ms CoreBuild 1 calls 1> 0 ms _CheckForDeletedResourceFile 1 calls 1> 0 ms GetFrameworkPaths 1 calls 1> 0 ms _ValidateLinkMode 1 calls 1> 0 ms DeleteBuildInfoFile 1 calls 1> 0 ms _CollectPCLMdbFiles 1 calls 1> 0 ms _CompileDex 1 calls 1> 0 ms GetInstalledSDKLocations 1 calls 1> 0 ms BeforeClean 1 calls 1> 0 ms BuildOnlySettings 1 calls 1> 0 ms _ValidateResourceCache 1 calls 1> 0 ms BeforeResolveReferences 1 calls 1> 0 ms _CheckForContent 1 calls 1> 0 ms BeforeResGen 1 calls 1> 0 ms PrepareRdlFiles 1 calls 1> 0 ms AfterClean 1 calls 1> 0 ms _SetupApplicationJavaClass 1 calls 1> 0 ms ValidationExtension 1 calls 1> 0 ms _IncludeInstanceRunReference 1 calls 1> 0 ms ResolveReferences 1 calls 1> 0 ms CreateCustomManifestResourceNames 1 calls 1> 0 ms ResGen 1 calls 1> 0 ms BeforeBuild 1 calls 1> 1 ms _SplitProjectReferencesByFileExistence 1 calls 1> 1 ms _GenerateSatelliteAssemblyInputs 1 calls 1> 1 ms PrepareForRun 1 calls 1> 1 ms CleanXsdCodeGen 1 calls 1> 1 ms GenerateTargetFrameworkMonikerAttribute 1 calls 1> 1 ms ResolveProjectReferences 1 calls 1> 1 ms AssignTargetPaths 1 calls 1> 1 ms _CreateIntermediateAssembliesDir 1 calls 1> 1 ms GetCopyToOutputDirectoryItems 1 calls 1> 1 ms PreXsdCodeGen 1 calls 1> 1 ms _GetReferenceAssemblyPaths 1 calls 1> 1 ms CoreResGen 1 calls 1> 1 ms _CleanGeneratedDeploymentFiles 1 calls 1> 1 ms SetBuildInfoDefaults 1 calls 1> 1 ms AssignProjectConfiguration 1 calls 1> 1 ms _CreatePackageWorkspace 1 calls 1> 1 ms _GetMonoPlatformJarPath 1 calls 1> 1 ms PrepareForBuild 1 calls 1> 1 ms _CalculateAdditionalResourceCacheDirectories 1 calls 1> 1 ms _ComputeAndroidResourcePaths 1 calls 1> 1 ms _SetEmbeddedWin32ManifestProperties 1 calls 1> 1 ms _GetAddOnPlatformLibraries 1 calls 1> 1 ms _GetLibraryImports 1 calls 1> 1 ms SplitResourcesByCulture 1 calls 1> 1 ms GetReferenceAssemblyPaths 1 calls 1> 1 ms _CheckProjectItems 1 calls 1> 1 ms _AdjustJavacVersionArguments 1 calls 1> 1 ms _CleanGeneratedDebuggingFiles 1 calls 1> 2 ms _PrepareAssemblies 1 calls 1> 2 ms _FindJavaStubFiles 1 calls 1> 2 ms _ExtractLibraryProjectImports 1 calls 1> 2 ms _StripEmbeddedLibraries 1 calls 1> 2 ms _CleanGetCurrentAndPriorFileWrites 1 calls 1> 2 ms _GetAdditionalResourcesFromAssemblies 1 calls 1> 2 ms _FindCompiledJavaFiles 1 calls 1> 2 ms _CheckDuplicateJavaLibraries 1 calls 1> 2 ms _AddLibraryProjectsEmbeddedResourceToProject 1 calls 1> 3 ms _ComputeAndroidAssetsPaths 1 calls 1> 3 ms CopyFilesToOutputDirectory 1 calls 1> 3 ms CoreClean 1 calls 1> 3 ms _CollectPdbFiles 1 calls 1> 3 ms GetBuiltProjectOutputRecursive 1 calls 1> 3 ms _CollectConfigFiles 1 calls 1> 3 ms _ValidateAndroidPackageProperties 1 calls 1> 3 ms _WriteResolvedAssemblies 1 calls 1> 4 ms _CreatePropertiesCache 1 calls 1> 4 ms _ResolveMonoAndroidSdks 1 calls 1> 4 ms _AddDebugStaticResources 1 calls 1> 4 ms _BuildLibraryImportsCache 1 calls 1> 4 ms _CollectMdbFiles 1 calls 1> 5 ms _CheckForInvalidConfigurationAndPlatform 1 calls 1> 7 ms _ResolveSatellitePaths 1 calls 1> 7 ms _GeneratePackageManagerJava 1 calls 1> 8 ms _DetermineJavaLibrariesToCompile 1 calls 1> 9 ms IncrementalClean 1 calls 1> 10 ms _AddStaticResources 1 calls 1> 11 ms _CleanMonoAndroidIntermediateDir 1 calls 1> 11 ms _GenerateAndroidResourceDir 1 calls 1> 12 ms _CleanMsymArchive 1 calls 1> 18 ms _SetLatestTargetFrameworkVersion 1 calls 1> 20 ms ResolveAssemblyReferences 1 calls 1> 27 ms ImplicitlyExpandDesignTimeFacades 1 calls 1> 30 ms _BuildSdkCache 1 calls 1> 35 ms _ConvertPdbFiles 1 calls 1> 45 ms _CheckTargetFrameworks 1 calls 1> 46 ms _ResolveLibraryProjectImports 1 calls 1> 52 ms _CreateBaseApk 1 calls 1> 66 ms _BuildAdditionalResourcesCache 1 calls 1> 72 ms _CopyMdbFiles 1 calls 1> 78 ms _ResolveAssemblies 1 calls 1> 115 ms _UpdateAndroidResgen 1 calls 1> 167 ms _GenerateJavaStubs 1 calls 1> 189 ms _GetPrimaryCpuAbi 1 calls 1> 453 ms _CopyIntermediateAssemblies 1 calls 1> 515 ms _LinkAssembliesNoShrink 1 calls 1> 657 ms _CompileToDalvikWithDx 1 calls 1> 664 ms _CompileJava 1 calls 1> 677 ms CoreCompile 1 calls 1> 1>Task Performance Summary: 1> 0 ms CallTarget 1 calls 1> 0 ms MSBuild 1 calls 1> 0 ms ResolveCodeAnalysisRuleSet 1 calls 1> 0 ms ReadLinesFromFile 2 calls 1> 0 ms GetFrameworkPath 1 calls 1> 0 ms FindAppConfigFile 1 calls 1> 0 ms AssignCulture 1 calls 1> 1 ms GetAppSettingsDirectory 1 calls 1> 1 ms ConvertToAbsolutePath 1 calls 1> 1 ms RemoveDuplicates 3 calls 1> 1 ms AssignTargetPath 6 calls 1> 1 ms CollectLibraryAssets 1 calls 1> 1 ms AssignProjectConfiguration 1 calls 1> 1 ms GetMonoPlatformJar 1 calls 1> 1 ms CalculateAdditionalResourceCacheDirectories 1 calls 1> 1 ms CreateTemporaryDirectory 2 calls 1> 1 ms GetAndroidDefineConstants 1 calls 1> 1 ms GetAddOnPlatformLibraries 1 calls 1> 1 ms ReadImportedLibrariesCache 1 calls 1> 1 ms ReadAdditionalResourcesFromAssemblyCache 1 calls 1> 1 ms CheckProjectItems 1 calls 1> 1 ms GetReferenceAssemblyPaths 2 calls 1> 1 ms AdjustJavacVersionArguments 1 calls 1> 2 ms FindUnderPath 7 calls 1> 2 ms Message 17 calls 1> 2 ms ReadLibraryProjectImportsCache 1 calls 1> 2 ms MakeDir 6 calls 1> 2 ms CreateAndroidResourceStamp 1 calls 1> 2 ms CreateProperty 42 calls 1> 2 ms CopyIfChanged 1 calls 1> 2 ms GetAndroidPackageName 2 calls 1> 2 ms GetJavaPlatformJar 1 calls 1> 2 ms GetExtraPackages 2 calls 1> 2 ms CheckDuplicateJavaLibraries 1 calls 1> 2 ms CreateManagedLibraryResourceArchive 1 calls 1> 3 ms RemoveUnknownFiles 1 calls 1> 3 ms AndroidComputeResPaths 2 calls 1> 3 ms CreateResgenManifest 1 calls 1> 4 ms GetImportedLibraries 1 calls 1> 4 ms GetFilesThatExist 3 calls 1> 6 ms Touch 7 calls 1> 6 ms CopyGeneratedJavaResourceClasses 2 calls 1> 7 ms CreateItem 20 calls 1> 7 ms GeneratePackageManagerJava 1 calls 1> 7 ms DetermineJavaLibrariesToCompile 1 calls 1> 8 ms Delete 28 calls 1> 10 ms CopyResource 4 calls 1> 11 ms RemoveDirFixed 5 calls 1> 12 ms WriteLinesToFile 5 calls 1> 17 ms ReadResolvedSdksCache 1 calls 1> 27 ms ResolveAssemblyReference 2 calls 1> 29 ms GenerateResourceDesigner 1 calls 1> 29 ms ResolveSdks 1 calls 1> 29 ms ConvertResourcesCases 3 calls 1> 35 ms ConvertDebuggingFiles 1 calls 1> 45 ms CheckTargetFrameworks 1 calls 1> 45 ms ResolveLibraryProjectImports 1 calls 1> 52 ms CopyMdbFiles 1 calls 1> 65 ms GetAdditionalResourcesFromAssemblies 1 calls 1> 77 ms ResolveAssemblies 1 calls 1> 92 ms Aapt 2 calls 1> 161 ms GenerateJavaStubs 1 calls 1> 186 ms GetPrimaryCpuAbi 1 calls 1> 479 ms Copy 7 calls 1> 513 ms LinkAssemblies 1 calls 1> 655 ms CompileToDalvik 1 calls 1> 660 ms Csc 1 calls 1> 664 ms Javac 1 calls 1> 1>Build succeeded. 1> 1>Time Elapsed 00:00:04.08Notice that we can tell how long this build took: 4 seconds. However that doesn't answer your case, but with a proper log like this, we can then investigate that
TargetorTaskand figure out what your project is bottlenecking on. My guess would beaapt, but that's just because even Android Studio would hang here as this tooling is inside theAndroid SDKand it responsible for packaging android assets.EDIT:
It looks like this build took ~2 minutes to build the 2 projects. One being in
C:\Development\Apps\trunk\App.Droid\App.Droid.ServiceClient\App.Droid.ServiceClient.csprojand the other inC:\Development\Apps\trunk\App.Droid\App.Droid\App.Droid.csproj(40 / 87 seconds respectively). This seems quite normal for a project with this many third party dependencies to Android Support / Google Play. You can search the stringTask "GetAdditionalResourcesFromAssembliesto show 6 places where this is defined. There are 2 Tasks being invoked here due to the 2 Android projects.It might be worth a comparison of an Android Studio project with that many external dependencies and compare the time. I do know that we currently have quite a bit of on-going work with regards to the
GetAdditionalResourcesFromAssembliesTask. However this work won't be available until Cycle 9-10. This work is currently apart of a pull request:https://github.com/xamarin/xamarin-android/pull/296
(You can tell it's almost brand new due to the commit time).
As you can tell from this Task, there will be the following improvements:
The current Task always downloads data from google. This is regardless of whether the files exist in the Android sdk directory already. This commit changes the GetAdditionalResourcesFromAssemblies task to look in the "extras" folder in the android sdk for the required .aar file. This will mean if a user has an up to date sdk, there will be almost no need to download the files from the internet.
There's also a PR - https://github.com/xamarin/xamarin-android/pull/292 (Thanks @Mikhail)
Which addresses reusing the computed hash which can also lower build times.
TLDR;
GetAdditionalResourcesFromAssembliesneeds a bit more work for build times to be shorter. This is currently in the works.EDIT 2:
This is currently resolved in support libraries that include a dependency to
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