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[Perf] Windows/x64: 10 Regressions on 6/17/2023 2:27:15 AM #18999

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performanceautofiler bot opened this issue Jun 20, 2023 · 2 comments
Closed

[Perf] Windows/x64: 10 Regressions on 6/17/2023 2:27:15 AM #18999

performanceautofiler bot opened this issue Jun 20, 2023 · 2 comments
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arch-x64 branch-refs/heads/main kind-micro Look Again os-windows perf-regression PGO Applied if there were any profile guided optimization updates in the observed interval. runtime-coreclr

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performanceautofiler bot commented Jun 20, 2023 •
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Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.IO.Tests.Perf_FileStream

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
ReadAsync - Duration of single invocation 619.65 μs 855.91 μs 1.38 0.16 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_FileStream*'

Payloads

Baseline
Compare

Histogram

System.IO.Tests.Perf_FileStream.ReadAsync(fileSize: 1048576, userBufferSize: 4096, options: None)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 855.9090625 > 656.8939379322707.
IsChangePoint: Marked as a change because one of 5/3/2023 11:54:24 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -5.6641693830186215 (T) = (0 -734644.1572133583) / Math.Sqrt((99748708.30199248 / (38)) + (3036310149.3695436 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.1657259433698982 = (630203.1462812244 - 734644.1572133583) / 630203.1462812244 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_Array

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
ArrayAssign3D - Duration of single invocation 816.86 μs 860.46 μs 1.05 0.10 False
Reverse - Duration of single invocation 16.08 ns 21.66 ns 1.35 0.09 False

graph
graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Array*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Array.ArrayAssign3D

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 860.4576417004048 > 853.2043512303898.
IsChangePoint: Marked as a change because one of 5/16/2023 12:30:38 AM, 5/20/2023 9:58:12 PM, 5/29/2023 11:58:32 PM, 6/9/2023 2:21:24 AM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -11.637765526910504 (T) = (0 -864035.6190065619) / Math.Sqrt((3178993167.0095315 / (38)) + (47159252.56930888 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.14546744215503354 = (754308.3174681964 - 864035.6190065619) / 754308.3174681964 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

System.Tests.Perf_Array.Reverse

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 21.655814250297176 > 16.880257891363623.
IsChangePoint: Marked as a change because one of 4/12/2023 8:39:35 PM, 4/28/2023 10:42:00 AM, 5/3/2023 6:00:09 PM, 5/23/2023 1:41:12 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -36.827528073054694 (T) = (0 -21.293346086652733) / Math.Sqrt((0.013517150000119663 / (38)) + (0.17397772957019392 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.32042603853855206 = (16.126117984025985 - 21.293346086652733) / 16.126117984025985 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Memory.Span<Int32>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
Reverse - Duration of single invocation 33.91 ns 38.93 ns 1.15 0.12 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Span&lt;Int32&gt;*'

Payloads

Baseline
Compare

Histogram

System.Memory.Span<Int32>.Reverse(Size: 512)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 38.92759652943599 > 34.86743985946341.
IsChangePoint: Marked as a change because one of 4/6/2023 6:23:49 AM, 4/12/2023 8:39:35 PM, 4/28/2023 10:42:00 AM, 5/3/2023 7:05:50 AM, 5/23/2023 2:36:40 AM, 6/5/2023 10:43:22 AM, 6/9/2023 2:21:24 AM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -11.319014656299956 (T) = (0 -39.09637643278227) / Math.Sqrt((6.5787765834441965 / (38)) + (0.08650232162899853 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.14124175104953682 = (34.257751608568036 - 39.09637643278227) / 34.257751608568036 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_UInt16

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
ToString - Duration of single invocation 8.45 ns 10.02 ns 1.19 0.08 False
ToString - Duration of single invocation 8.48 ns 9.85 ns 1.16 0.08 False

graph
graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_UInt16*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_UInt16.ToString(value: 12345)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 10.020042622285366 > 8.863432188058791.
IsChangePoint: Marked as a change because one of 3/20/2023 8:31:51 AM, 3/31/2023 8:05:26 PM, 4/9/2023 11:04:55 PM, 4/12/2023 8:39:35 PM, 4/17/2023 6:40:18 PM, 6/7/2023 8:50:18 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -14.137859099529827 (T) = (0 -9.804909171072296) / Math.Sqrt((0.007526483929330947 / (38)) + (0.07448500433740517 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.15305148105879068 = (8.503444410017954 - 9.804909171072296) / 8.503444410017954 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

System.Tests.Perf_UInt16.ToString(value: 65535)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 9.85478739768936 > 8.867800896787779.
IsChangePoint: Marked as a change because one of 3/20/2023 8:31:51 AM, 3/31/2023 8:05:26 PM, 4/9/2023 11:04:55 PM, 4/17/2023 6:40:18 PM, 6/7/2023 8:50:18 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -18.94403453073607 (T) = (0 -9.927948487786871) / Math.Sqrt((0.07648647720705459 / (38)) + (0.03114164325636983 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.1643671476414094 = (8.52647595554146 - 9.927948487786871) / 8.52647595554146 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
ReadAsync - Duration of single invocation 591.37 μs 653.00 μs 1.10 0.20 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess*'

Payloads

Baseline
Compare

Histogram

System.IO.Tests.Perf_RandomAccess.ReadAsync(fileSize: 1048576, bufferSize: 4096, options: None)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 653.0014723557692 > 621.7060313657407.
IsChangePoint: Marked as a change because one of 5/14/2023 5:56:01 AM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -9.57961537939529 (T) = (0 -661607.0249621617) / Math.Sqrt((106730926.6373479 / (38)) + (409495634.2217707 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.11189832169868175 = (595024.7536585935 - 661607.0249621617) / 595024.7536585935 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in PerfLabTests.LowLevelPerf

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
NewDelegateClassEmptyStaticFn - Duration of single invocation 569.93 μs 765.10 μs 1.34 0.70 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.LowLevelPerf*'

Payloads

Baseline
Compare

Histogram

PerfLabTests.LowLevelPerf.NewDelegateClassEmptyStaticFn

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 765.0967857142857 > 550.5539368130999.
IsChangePoint: Marked as a change because one of 4/24/2023 11:08:13 AM, 5/10/2023 2:00:36 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -4.5017517776489 (T) = (0 -728886.4187745372) / Math.Sqrt((7467798655.722069 / (38)) + (8009007300.836262 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.25560677258618864 = (580505.3259415294 - 728886.4187745372) / 580505.3259415294 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Memory.Span<Byte>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
Reverse - Duration of single invocation 7.45 ns 13.78 ns 1.85 0.14 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Span&lt;Byte&gt;*'

Payloads

Baseline
Compare

Histogram

System.Memory.Span<Byte>.Reverse(Size: 512)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 13.775071510366415 > 7.822435410536723.
IsChangePoint: Marked as a change because one of 4/10/2023 1:33:42 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -20.737842228935367 (T) = (0 -13.630086713274814) / Math.Sqrt((2.7176951025426765 / (38)) + (0.011318890597614413 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.6962052180011842 = (8.035635410517466 - 13.630086713274814) / 8.035635410517466 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

Run Information

Name Value
Architecture x64
OS Windows 10.0.19042
Queue OwlWindows
Baseline 4ae16683d798947f08c81d0bb604cfb06bb51bb5
Compare 27b7aea81e30194853f2a114e240dfe7f8e01cac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Memory.Span<Char>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
Reverse - Duration of single invocation 17.20 ns 22.21 ns 1.29 0.20 False

graph
Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Span&lt;Char&gt;*'

Payloads

Baseline
Compare

Histogram

System.Memory.Span<Char>.Reverse(Size: 512)

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 22.21270736896173 > 16.89514027740817.
IsChangePoint: Marked as a change because one of 4/12/2023 8:39:35 PM, 4/28/2023 10:42:00 AM, 5/6/2023 11:12:53 AM, 5/23/2023 1:41:12 PM, 6/16/2023 8:27:26 PM, 6/19/2023 11:51:49 PM falls between 6/10/2023 7:23:52 PM and 6/19/2023 11:51:49 PM.
IsRegressionStdDev: Marked as regression because -32.29618110460153 (T) = (0 -22.22643130550404) / Math.Sqrt((0.30948908471832043 / (38)) + (0.1967238396166036 / (9))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (38) + (9) - 2, .025) and -0.33633970942733776 = (16.63232121945156 - 22.22643130550404) / 16.63232121945156 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

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@performanceautofiler performanceautofiler bot added arch-x64 branch-refs/heads/main kind-micro os-windows perf-regression PGO Applied if there were any profile guided optimization updates in the observed interval. runtime-coreclr untriaged labels Jun 20, 2023
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EgorBo commented Jun 20, 2023

I suspect dotnet/runtime#87410 but let's wait a week or two to make sure it's not bi-modal

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EgorBo commented Jul 18, 2023

FileStream benchmark most likely regressed in dotnet/runtime#87103, the rest are back to the normal level

@EgorBo EgorBo closed this as completed Jul 18, 2023
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