Add source generator self-benchmark covering all expression transformers#168
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Add source generator self-benchmark covering all expression transformers#168
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…iagnoser Co-authored-by: PhenX <42170+PhenX@users.noreply.github.com>
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[WIP] Add benchmark for ProjectionExpressionGenerator performance
Add source generator self-benchmark (GeneratorBenchmarks)
Mar 4, 2026
…ctable constructors Co-authored-by: PhenX <42170+PhenX@users.noreply.github.com>
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Add source generator self-benchmark (GeneratorBenchmarks)
Add source generator self-benchmark covering all expression transformers
Mar 4, 2026
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Pull request overview
Adds a new compile-time BenchmarkDotNet benchmark to measure the source generator’s execution cost (including the RunGeneratorsAndUpdateCompilation path) across varying amounts of [Projectable] code, to help quantify generator overhead such as the EmitRegistry step.
Changes:
- Added
GeneratorBenchmarksto benchmarkProjectionExpressionGeneratoron synthetic compilations (cold and incremental/warm paths). - Updated the benchmarks project to reference Roslyn +
Basic.Reference.Assembliesand to make the generator assembly available at runtime.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| benchmarks/EntityFrameworkCore.Projectables.Benchmarks/GeneratorBenchmarks.cs | New BenchmarkDotNet benchmark building a synthetic compilation and timing generator execution (cold + incremental). |
| benchmarks/EntityFrameworkCore.Projectables.Benchmarks/EntityFrameworkCore.Projectables.Benchmarks.csproj | Adds Roslyn + reference assemblies packages and adjusts generator project reference for runtime access. |
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benchmarks/EntityFrameworkCore.Projectables.Benchmarks/GeneratorBenchmarks.cs
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Updated [EntityFrameworkCore.Projectables](https://github.com/EFNext/EntityFrameworkCore.Projectables) from 5.0.2 to 6.0.0. <details> <summary>Release notes</summary> _Sourced from [EntityFrameworkCore.Projectables's releases](https://github.com/EFNext/EntityFrameworkCore.Projectables/releases)._ ## 6.0.0 ## What's Changed ### Major changes * Add support for projectable method overloads by @PhenX in EFNext/EntityFrameworkCore.Projectables#143 * Add C#14 extension members by @PhenX in EFNext/EntityFrameworkCore.Projectables#148 * Support explicitly implemented interface members and default interface properties by @rhodon-jargon in EFNext/EntityFrameworkCore.Projectables#135 * Support block-bodied members with [Projectable] attribute by @Copilot in EFNext/EntityFrameworkCore.Projectables#152 * Add ExpandEnumMethods to expand enum extension calls into ternary expressions by @Copilot in EFNext/EntityFrameworkCore.Projectables#150 * Add support for pattern matching in various cases by @PhenX in EFNext/EntityFrameworkCore.Projectables#158 * Add support for projectable constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#161 * AOT-compatible static projection registry + SyntaxFactory-based emission by @Copilot in EFNext/EntityFrameworkCore.Projectables#166 * Improve UseMemberBody and add new diagnostics by @PhenX in EFNext/EntityFrameworkCore.Projectables#174 * Add code fixes for EFP0001, EFP0002 and EFP0008, with tests by @PhenX in EFNext/EntityFrameworkCore.Projectables#181 * Add a code fixer and a code refactorer to transform factory methods into constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#183 * Improve source generator and analyzer responsiveness by @PhenX in EFNext/EntityFrameworkCore.Projectables#171 * Docs website by @PhenX in EFNext/EntityFrameworkCore.Projectables#194 * Implement global MSBuild defaults for [Projectable] options by @koenbeuk in EFNext/EntityFrameworkCore.Projectables#191 ### Other changes * Check source generator output compilation by @PhenX in EFNext/EntityFrameworkCore.Projectables#156 * Fix GetImplementingProperty issue when using interfaces by @PhenX in EFNext/EntityFrameworkCore.Projectables#144 * Full qualification not needed anymore by @PhenX in EFNext/EntityFrameworkCore.Projectables#157 * Split generator tests in different classes by @PhenX in EFNext/EntityFrameworkCore.Projectables#162 * Refactor ExpressionSyntaxRewriter into focused partial class files by @Copilot in EFNext/EntityFrameworkCore.Projectables#163 * Update readme and add new test for constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#165 * Remove obsolete code by @PhenX in EFNext/EntityFrameworkCore.Projectables#167 * Add source generator self-benchmark covering all expression transformers by @Copilot in EFNext/EntityFrameworkCore.Projectables#168 * Fix null conditional rewrite generating invalid member access on nullable value types by @Copilot in EFNext/EntityFrameworkCore.Projectables#169 * Improve generator benchmark with more realistic scenario by @PhenX in EFNext/EntityFrameworkCore.Projectables#170 * Fix stale incremental generator cache when referenced types change in other source files by @Copilot in EFNext/EntityFrameworkCore.Projectables#172 * Add tests for properties with a getter and setter by @PhenX in EFNext/EntityFrameworkCore.Projectables#173 * UseMemberBody more strict with expressions by @PhenX in EFNext/EntityFrameworkCore.Projectables#175 * Add custom Copilot instructions by @PhenX in EFNext/EntityFrameworkCore.Projectables#177 * Reorganize generator project by @PhenX in EFNext/EntityFrameworkCore.Projectables#178 * Add closure resolution benchmark by @PhenX in EFNext/EntityFrameworkCore.Projectables#179 * Feature/optimize closures by @PhenX in EFNext/EntityFrameworkCore.Projectables#180 * Feature/optimize resolver by @PhenX in EFNext/EntityFrameworkCore.Projectables#182 * Update github project urls by @PhenX in EFNext/EntityFrameworkCore.Projectables#184 * Update deps by @PhenX in EFNext/EntityFrameworkCore.Projectables#185 * Remove obsolete verified files and name net8 files correctly by @PhenX in EFNext/EntityFrameworkCore.Projectables#186 * Remove all allocations when resolving and make it even faster by @PhenX in EFNext/EntityFrameworkCore.Projectables#189 * Add devcontainer configuration for C# (.NET) development by @koenbeuk in EFNext/EntityFrameworkCore.Projectables#190 **Full Changelog**: EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0 Commits viewable in [compare view](EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0). </details> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) </details> --------- Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: James Gunn <james@gunn.io>
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Updated [EntityFrameworkCore.Projectables](https://github.com/EFNext/EntityFrameworkCore.Projectables) from 5.0.2 to 6.0.0. <details> <summary>Release notes</summary> _Sourced from [EntityFrameworkCore.Projectables's releases](https://github.com/EFNext/EntityFrameworkCore.Projectables/releases)._ ## 6.0.0 ## What's Changed ### Major changes * Add support for projectable method overloads by @PhenX in EFNext/EntityFrameworkCore.Projectables#143 * Add C#14 extension members by @PhenX in EFNext/EntityFrameworkCore.Projectables#148 * Support explicitly implemented interface members and default interface properties by @rhodon-jargon in EFNext/EntityFrameworkCore.Projectables#135 * Support block-bodied members with [Projectable] attribute by @Copilot in EFNext/EntityFrameworkCore.Projectables#152 * Add ExpandEnumMethods to expand enum extension calls into ternary expressions by @Copilot in EFNext/EntityFrameworkCore.Projectables#150 * Add support for pattern matching in various cases by @PhenX in EFNext/EntityFrameworkCore.Projectables#158 * Add support for projectable constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#161 * AOT-compatible static projection registry + SyntaxFactory-based emission by @Copilot in EFNext/EntityFrameworkCore.Projectables#166 * Improve UseMemberBody and add new diagnostics by @PhenX in EFNext/EntityFrameworkCore.Projectables#174 * Add code fixes for EFP0001, EFP0002 and EFP0008, with tests by @PhenX in EFNext/EntityFrameworkCore.Projectables#181 * Add a code fixer and a code refactorer to transform factory methods into constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#183 * Improve source generator and analyzer responsiveness by @PhenX in EFNext/EntityFrameworkCore.Projectables#171 * Docs website by @PhenX in EFNext/EntityFrameworkCore.Projectables#194 * Implement global MSBuild defaults for [Projectable] options by @koenbeuk in EFNext/EntityFrameworkCore.Projectables#191 ### Other changes * Check source generator output compilation by @PhenX in EFNext/EntityFrameworkCore.Projectables#156 * Fix GetImplementingProperty issue when using interfaces by @PhenX in EFNext/EntityFrameworkCore.Projectables#144 * Full qualification not needed anymore by @PhenX in EFNext/EntityFrameworkCore.Projectables#157 * Split generator tests in different classes by @PhenX in EFNext/EntityFrameworkCore.Projectables#162 * Refactor ExpressionSyntaxRewriter into focused partial class files by @Copilot in EFNext/EntityFrameworkCore.Projectables#163 * Update readme and add new test for constructors by @PhenX in EFNext/EntityFrameworkCore.Projectables#165 * Remove obsolete code by @PhenX in EFNext/EntityFrameworkCore.Projectables#167 * Add source generator self-benchmark covering all expression transformers by @Copilot in EFNext/EntityFrameworkCore.Projectables#168 * Fix null conditional rewrite generating invalid member access on nullable value types by @Copilot in EFNext/EntityFrameworkCore.Projectables#169 * Improve generator benchmark with more realistic scenario by @PhenX in EFNext/EntityFrameworkCore.Projectables#170 * Fix stale incremental generator cache when referenced types change in other source files by @Copilot in EFNext/EntityFrameworkCore.Projectables#172 * Add tests for properties with a getter and setter by @PhenX in EFNext/EntityFrameworkCore.Projectables#173 * UseMemberBody more strict with expressions by @PhenX in EFNext/EntityFrameworkCore.Projectables#175 * Add custom Copilot instructions by @PhenX in EFNext/EntityFrameworkCore.Projectables#177 * Reorganize generator project by @PhenX in EFNext/EntityFrameworkCore.Projectables#178 * Add closure resolution benchmark by @PhenX in EFNext/EntityFrameworkCore.Projectables#179 * Feature/optimize closures by @PhenX in EFNext/EntityFrameworkCore.Projectables#180 * Feature/optimize resolver by @PhenX in EFNext/EntityFrameworkCore.Projectables#182 * Update github project urls by @PhenX in EFNext/EntityFrameworkCore.Projectables#184 * Update deps by @PhenX in EFNext/EntityFrameworkCore.Projectables#185 * Remove obsolete verified files and name net8 files correctly by @PhenX in EFNext/EntityFrameworkCore.Projectables#186 * Remove all allocations when resolving and make it even faster by @PhenX in EFNext/EntityFrameworkCore.Projectables#189 * Add devcontainer configuration for C# (.NET) development by @koenbeuk in EFNext/EntityFrameworkCore.Projectables#190 **Full Changelog**: EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0 Commits viewable in [compare view](EFNext/EntityFrameworkCore.Projectables@v5.0.2...v6.0.0). </details> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) </details> --------- Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: James Gunn <james@gunn.io>
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Adds a BenchmarkDotNet benchmark that measures
ProjectionExpressionGeneratorcompile-time performance directly — enabling measurement of theEmitRegistrystep overhead added in the AOT-compatible registry PR.New file:
GeneratorBenchmarks.cs[MemoryDiagnoser]+[Params(1, 10, 50, 100)]onProjectableCount[GlobalSetup]builds theCSharpCompilationonce; onlyRunGeneratorsAndUpdateCompilationis timedRunGenerator()— cold path: fresh driver each iterationRunGenerator_Incremental()— warm path: pre-warmed driver against a trivially-edited compilation (comment append), exercising incremental cachingGenerated source covers all generator transformer paths
Nine
[Projectable]member kinds cycle through theOrderentity:Additionally,
projectableCount / 9DTO classes are generated with[Projectable]constructors (requires parameterless companion ctor), exercising the constructor projection path inProjectableInterpreter.Modified:
EntityFrameworkCore.Projectables.Benchmarks.csprojMicrosoft.CodeAnalysis.CSharpandBasic.Reference.Assemblies.Net80/Net100ProjectReferencetoReferenceOutputAssembly="true"soProjectionExpressionGeneratoris accessible at runtimeOriginal prompt
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