[Perf] Changes at 4/26/2022 10:28:11 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	ubuntu 18.04
Baseline	b42adaddff9047e32c9d7f4145746dbb579758f2
Compare	b44c00892a9871a9f124c9173102a9a177a728d9
Diff	Diff

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	185.02 ns	563.72 ns	3.05	0.35	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Span<Byte>*'

Payloads

Baseline
Compare

Histogram

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

Description of detection logic

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 563.7188235457372 > 200.2631088480725.
IsChangePoint: Marked as a change because one of 4/5/2022 8:45:16 PM, 4/26/2022 6:18:08 AM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -400.1702403596274 (T) = (0 -571.594212958718) / Math.Sqrt((4.545491440177073 / (25)) + (26.855537051750716 / (37))) is less than -2.0002978220134566 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (25) + (37) - 2, .025) and -2.0028525564156996 = (190.35040922588323 - 571.594212958718) / 190.35040922588323 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.

Docs

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

### Run Information

Architecture	x64
OS	ubuntu 18.04
Baseline	b42adaddff9047e32c9d7f4145746dbb579758f2
Compare	b44c00892a9871a9f124c9173102a9a177a728d9
Diff	Diff

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
Reverse - Duration of single invocation	104.16 ns	308.25 ns	2.96	0.42	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Tests.Perf_Array*'

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Array.Reverse

Description of detection logic

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 308.2544844547287 > 108.99020742857017.
IsChangePoint: Marked as a change because one of 4/5/2022 2:02:34 AM, 4/26/2022 6:18:08 AM, 5/3/2022 11:42:39 AM falls between 4/24/2022 10:52:31 PM and 5/3/2022 11:42:39 AM.
IsRegressionStdDev: Marked as regression because -134.76022985061257 (T) = (0 -310.255791095735) / Math.Sqrt((4.801731096623203 / (25)) + (80.55516943288427 / (38))) is less than -1.9996235849941724 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (25) + (38) - 2, .025) and -1.9449474931206325 = (105.35189229026642 - 310.255791095735) / 105.35189229026642 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.

Docs

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

[lewing]

this looks like a regression from dotnet/runtime#64412