Benchmark results are produced by the benchmarks project
(SourceGeneratorFramework.BenchmarksBenchmarkDotNet and folded here for reference.
All benchmarks measure the production code path: generator runs configure
ValidateCodeWriterScopes = false and the writer is constructed with throwOnUnclosedScopes: false.
Scope tracking is a testing/debug feature and is excluded here because capturing an opening
StackTrace per scope dominates both time and allocation (for 1000 small classes it inflates the
writer benchmark from ~1.6 ms/2.3 MB to ~19 ms/22 MB). Tests opt into it so an unclosed using or
block fails fast; see Code-Writer.md .
BenchmarkDotNet v0.15.8
Windows 11 (10.0.28020.2991)
13th Gen Intel Core i9-13900KF 3.00GHz, 1 CPU, 32 logical and 24 physical cores
.NET SDK 10.0.401
.NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
Toolchain: InProcessEmitToolchain
Method Mean Error StdDev Gen0 Gen1 Gen2 Allocated ManyClasses 1.612 ms 0.0139 ms 0.0130 ms 142.5781 142.5781 142.5781 2.34 MB
Method Mean Error StdDev Gen0 Gen1 Allocated RunAsync 1.133 ms 0.0182 ms 0.0171 ms 54.6875 11.7188 1.03 MB
Method Count Mean Error StdDev Median Ratio RatioSD Allocated Alloc Ratio EquatableArrayEquals 10 4.1603 ns 0.1068 ns 0.1271 ns 4.1864 ns 1.001 0.04 - NA EquatableArrayGetHashCode 10 0.1677 ns 0.0091 ns 0.0085 ns 0.1688 ns 0.040 0.00 - NA ImmutableArrayReferenceEquals 10 0.0032 ns 0.0069 ns 0.0061 ns 0.0000 ns 0.001 0.00 - NA ImmutableArraySequenceEqual 10 3.7109 ns 0.0374 ns 0.0350 ns 3.7080 ns 0.893 0.03 - NA EquatableArrayEquals 100 29.9631 ns 0.2494 ns 0.2333 ns 29.9944 ns 1.000 0.01 - NA EquatableArrayGetHashCode 100 0.1705 ns 0.0086 ns 0.0081 ns 0.1685 ns 0.006 0.00 - NA ImmutableArrayReferenceEquals 100 0.0029 ns 0.0041 ns 0.0038 ns 0.0004 ns 0.000 0.00 - NA ImmutableArraySequenceEqual 100 29.3123 ns 0.2250 ns 0.2105 ns 29.3094 ns 0.978 0.01 - NA EquatableArrayEquals 1000 189.2828 ns 1.3004 ns 1.2164 ns 189.2343 ns 1.000 0.01 - NA EquatableArrayGetHashCode 1000 0.1855 ns 0.0109 ns 0.0102 ns 0.1817 ns 0.001 0.00 - NA ImmutableArrayReferenceEquals 1000 0.0275 ns 0.0178 ns 0.0167 ns 0.0251 ns 0.000 0.00 - NA ImmutableArraySequenceEqual 1000 191.8212 ns 2.4799 ns 2.3197 ns 191.5713 ns 1.013 0.01 - NA
Method Mean Error StdDev Ratio Gen0 Allocated Alloc Ratio GetDeclaredSymbolFromNode 115.5924 ns 0.8672 ns 0.7688 ns 1.000 0.0017 32 B 1.00 PreResolvedTargetSymbol 0.5658 ns 0.0182 ns 0.0170 ns 0.005 - - 0.00
Method ClassCount CompileToAssembly Mean Error StdDev Gen0 Gen1 Allocated RunAsync 1 False 5.725 μs 0.0552 μs 0.0489 μs 0.8545 0.2136 15.79 KB RunAsync 1 True 7,078.346 μs 133.0041 μs 124.4121 μs 23.4375 7.8125 458.51 KB RunAsync 10 False 7.579 μs 0.0873 μs 0.0729 μs 1.0147 0.2518 18.73 KB RunAsync 10 True 7,746.954 μs 150.9553 μs 239.4311 μs 23.4375 7.8125 555.61 KB RunAsync 100 False 25.144 μs 0.5020 μs 0.5580 μs 2.7161 0.4272 50.19 KB RunAsync 100 True 10,294.152 μs 203.6992 μs 382.5964 μs 78.1250 15.6250 1552.67 KB
Method Mean Error StdDev Allocated Int32Identity 15.19 ns 0.207 ns 0.193 ns - StringIdentity 14.85 ns 0.266 ns 0.236 ns - ListOfStringIdentity 16.72 ns 0.348 ns 0.386 ns - DictionaryIdentity 16.61 ns 0.289 ns 0.271 ns - NestedGenericIdentity 16.43 ns 0.323 ns 0.303 ns -
Method SpecCount Mean Error StdDev Gen0 Gen1 Allocated RunAsync 1 1.958 ms 0.0297 ms 0.0278 ms 62.5000 11.7188 1.16 MB RunAsync 5 2.555 ms 0.0368 ms 0.0344 ms 97.6563 23.4375 1.81 MB RunAsync 20 4.913 ms 0.0965 ms 0.1414 ms 234.3750 39.0625 4.27 MB
Run the benchmarks project and copy the generated reports into the tables above:
dotnet run -c Release --project src/src/SourceGeneratorFramework.Benchmarks --framework net10.0
Filter to a single benchmark with --filter "*Name*". The Markdown reports are written to
BenchmarkDotNet.Artifacts/results/.
