Memory usage improvements in build (#2626)
* Use a WorkspaceContext in dotnet-build to cache project data across multiple compilations in a single build action * Dramatically reduce string and object duplication by introducing a "Symbol Table" that shares instances of NuGetVersion, NuGetFramework, VersionRange and string across multiple lock-file parses Test Results: * Testing was done by compiling Microsoft.AspNetCore.Mvc (and it's dependencies) and taking memory snapshots after each compilation in dotMemory * We used to allocate ~3MB and deallocate ~2.5MB on EACH compilation in a single build action. This has been reduced to ~120KB allocated/deallocated * After introducing WorkspaceContext, total memory usage spiked from 6MB across the whole build action to about 13MB, introducing the symbol table dropped it back to about 5-6MB.
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@ -188,7 +188,7 @@ namespace Microsoft.DotNet.Tools.Compiler.Tests
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It.IsAny<string>()))
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.Returns(command.Object);
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var _args = new BuildCommandApp("dotnet compile", ".NET Compiler", "Compiler for the .NET Platform");
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var _args = new BuildCommandApp("dotnet compile", ".NET Compiler", "Compiler for the .NET Platform", WorkspaceContext.Create(designTime: false));
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_args.ConfigValue = ConfigValue;
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PreCompileScriptVariables = new Dictionary<string, string>();
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@ -219,7 +219,8 @@ namespace Microsoft.DotNet.Tools.Compiler.Tests
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rids.Add(rid);
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}
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var context = ProjectContext.Create(projectJson, TestAssetFramework, rids);
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var workspace = WorkspaceContext.Create(ProjectReaderSettings.ReadFromEnvironment(), designTime: false);
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var context = workspace.GetProjectContext(projectJson, TestAssetFramework, rids);
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managedCompiler.Compile(context, _args);
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RuntimeOutputDir = Path.Combine(OutputPath, rid);
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