[Perf] Windows/x64: 3 Regressions on 1/6/2023 8:14:14 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	1801b56a60576cdd156134ad80872dbf984e62e7
Compare	c2469455eab98fdcea71997d3cc5004a992fc88f
Diff	Diff

Regressions in System.Diagnostics.Perf_Activity

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
EnumerateActivityLinksLarge - Duration of single invocation	18.01 μs	19.00 μs	1.06	0.16	False
EnumerateActivityTagsLarge - Duration of single invocation	7.63 μs	8.81 μs	1.15	0.27	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Diagnostics.Perf_Activity.EnumerateActivityLinksLarge

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 19.001802745664744 > 18.473344046677212.
IsChangePoint: Marked as a change because one of 11/11/2022 5:53:56 PM, 11/16/2022 6:51:59 PM, 12/21/2022 9:23:17 AM, 12/28/2022 5:13:50 PM, 1/6/2023 5:32:27 AM, 1/10/2023 7:48:18 AM falls between 1/1/2023 3:57:25 AM and 1/10/2023 7:48:18 AM.
IsRegressionStdDev: Marked as regression because -7.993558711113361 (T) = (0 -20347.44236639447) / Math.Sqrt((306125.4583644331 / (31)) + (1392290.5597950395 / (17))) is less than -2.0128955989180297 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (31) + (17) - 2, .025) and -0.13508941943240746 = (17925.84973311534 - 20347.44236639447) / 17925.84973311534 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.

```#### System.Diagnostics.Perf_Activity.EnumerateActivityTagsLarge

```log

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 8.81253464203233 > 8.028710802659893.
IsChangePoint: Marked as a change because one of 11/18/2022 8:48:12 PM, 11/29/2022 2:55:01 PM, 1/7/2023 12:45:06 AM, 1/10/2023 7:48:18 AM falls between 1/1/2023 3:57:25 AM and 1/10/2023 7:48:18 AM.
IsRegressionStdDev: Marked as regression because -10.987515142370894 (T) = (0 -9528.08312797321) / Math.Sqrt((176912.92077972653 / (35)) + (219648.51128446564 / (13))) is less than -2.0128955989180297 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (13) - 2, .025) and -0.2060561645605624 = (7900.1985213888065 - 9528.08312797321) / 7900.1985213888065 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	Windows 10.0.19042
Baseline	1801b56a60576cdd156134ad80872dbf984e62e7
Compare	c2469455eab98fdcea71997d3cc5004a992fc88f
Diff	Diff

Regressions in System.Collections.IterateForEach<String>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadOnlySpan - Duration of single invocation	152.95 ns	290.18 ns	1.90	0.01	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.IterateForEach<String>*'

Payloads

Baseline
Compare

Histogram

System.Collections.IterateForEach<String>.ReadOnlySpan(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 290.18170314225557 > 160.59572594038863.
IsChangePoint: Marked as a change because one of 1/6/2023 5:32:27 AM, 1/10/2023 7:48:18 AM falls between 1/1/2023 3:57:25 AM and 1/10/2023 7:48:18 AM.
IsRegressionStdDev: Marked as regression because -1395.566461067694 (T) = (0 -290.49105960536184) / Math.Sqrt((0.2650850199193287 / (31)) + (0.018463495878278974 / (17))) is less than -2.0128955989180297 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (31) + (17) - 2, .025) and -0.8925826528195163 = (153.48923291281173 - 290.49105960536184) / 153.48923291281173 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