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Optimize Enumerable.OfType with custom iterator#99216
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stephentoub commentedMar 4, 2024
| Method | Toolchain | Target | Mean | Ratio | Allocated | Alloc Ratio |
|---|---|---|---|---|---|---|
| OfTypeForEach | \main\corerun.exe | Object | 112.64 ns | 1.00 | 88 B | 1.00 |
| OfTypeForEach | \pr\corerun.exe | Object | 66.18 ns | 0.59 | 80 B | 0.91 |
| OfTypeCount | \main\corerun.exe | Object | 119.40 ns | 1.00 | 88 B | 1.00 |
| OfTypeCount | \pr\corerun.exe | Object | 101.25 ns | 0.85 | 80 B | 0.91 |
| OfTypeToArray | \main\corerun.exe | Object | 207.82 ns | 1.00 | 160 B | 1.00 |
| OfTypeToArray | \pr\corerun.exe | Object | 129.60 ns | 0.62 | 152 B | 0.95 |
| OfTypeToList | \main\corerun.exe | Object | 214.81 ns | 1.00 | 264 B | 1.00 |
| OfTypeToList | \pr\corerun.exe | Object | 158.42 ns | 0.74 | 256 B | 0.97 |
| OfTypeFirst | \main\corerun.exe | Object | 46.60 ns | 1.00 | 88 B | 1.00 |
| OfTypeFirst | \pr\corerun.exe | Object | 47.11 ns | 1.01 | 80 B | 0.91 |
| OfTypeLast | \main\corerun.exe | Object | 146.69 ns | 1.00 | 88 B | 1.00 |
| OfTypeLast | \pr\corerun.exe | Object | 72.18 ns | 0.49 | 80 B | 0.91 |
| OfTypeSelectForEach | \main\corerun.exe | Object | 172.42 ns | 1.00 | 144 B | 1.00 |
| OfTypeSelectForEach | \pr\corerun.exe | Object | 84.93 ns | 0.49 | 104 B | 0.72 |
| OfTypeForEach | \main\corerun.exe | String | 2,175.93 ns | 1.00 | 88 B | 1.00 |
| OfTypeForEach | \pr\corerun.exe | String | 1,046.87 ns | 0.48 | 80 B | 0.91 |
| OfTypeCount | \main\corerun.exe | String | 2,065.02 ns | 1.00 | 88 B | 1.00 |
| OfTypeCount | \pr\corerun.exe | String | 974.42 ns | 0.47 | 80 B | 0.91 |
| OfTypeToArray | \main\corerun.exe | String | 3,289.18 ns | 1.00 | 1432 B | 1.00 |
| OfTypeToArray | \pr\corerun.exe | String | 4,942.53 ns | 1.50 | 1424 B | 0.99 |
| OfTypeToList | \main\corerun.exe | String | 4,016.68 ns | 1.00 | 4352 B | 1.00 |
| OfTypeToList | \pr\corerun.exe | String | 2,926.28 ns | 0.73 | 4344 B | 1.00 |
| OfTypeFirst | \main\corerun.exe | String | 44.71 ns | 1.00 | 88 B | 1.00 |
| OfTypeFirst | \pr\corerun.exe | String | 31.20 ns | 0.70 | 80 B | 0.91 |
| OfTypeLast | \main\corerun.exe | String | 2,226.84 ns | 1.00 | 88 B | 1.00 |
| OfTypeLast | \pr\corerun.exe | String | 1,339.43 ns | 0.59 | 80 B | 0.91 |
| OfTypeSelectForEach | \main\corerun.exe | String | 2,689.61 ns | 1.00 | 144 B | 1.00 |
| OfTypeSelectForEach | \pr\corerun.exe | String | 1,150.00 ns | 0.43 | 104 B | 0.72 |
ghost commentedMar 4, 2024
Tagging subscribers to this area: @dotnet/area-system-linq Issue Details
usingBenchmarkDotNet.Attributes;usingBenchmarkDotNet.Running;usingSystem.Reflection;BenchmarkSwitcher.FromAssembly(typeof(Tests).Assembly).Run(args);[MemoryDiagnoser(false)][HideColumns("Job","Error","StdDev","Median","RatioSD")]publicpartialclassTests{privateIEnumerable<MemberInfo>_members;[Params(typeof(object),typeof(string))]publicTypeTarget{get;set;}[GlobalSetup]publicvoidSetup()=>_members=Target.GetMembers();[Benchmark]publicintOfTypeForEach(){intsum=0;foreach(MethodInfomemberin_members.OfType<MethodInfo>()){sum+=member.Name.Length;}returnsum;}[Benchmark]publicintOfTypeCount()=>_members.OfType<MethodInfo>().Count();[Benchmark]publicMethodInfo[]OfTypeToArray()=>_members.OfType<MethodInfo>().ToArray();[Benchmark]publicList<MethodInfo>OfTypeToList()=>_members.OfType<MethodInfo>().ToList();[Benchmark]publicMethodInfoOfTypeFirst()=>_members.OfType<MethodInfo>().First();[Benchmark]publicMethodInfoOfTypeLast()=>_members.OfType<MethodInfo>().Last();[Benchmark]publicintOfTypeSelectForEach(){intsum=0;foreach(stringnamein_members.OfType<MethodInfo>().Select(m=>m.Name)){sum+=name.Length;}returnsum;}}
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src/libraries/System.Linq.Parallel/tests/QueryOperators/AsEnumerableTests.csShow resolvedHide resolved
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eiriktsarpalis approved these changesMar 4, 2024
Only moved the code; didn't change it at all.
3 tasks
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