[Perf] Windows/arm64: 2 Regressions on 3/25/2023 3:46:49 AM

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	Windows 10.0.19041
Queue	SurfaceWindows
Baseline	605eb6eda2b1e04f79a2f7937506cd9deaec6a9b
Compare	c22b79ae2d1b2a9ca73a42e246e3f3da02e631fe
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in Microsoft.Extensions.Primitives.StringSegmentBenchmark

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Equals_Valid - Duration of single invocation	1.43 ns	4.44 ns	3.10	0.54	False

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 'Microsoft.Extensions.Primitives.StringSegmentBenchmark*'

Payloads

Baseline
Compare

Histogram

Microsoft.Extensions.Primitives.StringSegmentBenchmark.Equals_Valid

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 4.435410164323612 > 3.5566142273774313.
IsChangePoint: Marked as a change because one of 3/25/2023 12:18:49 AM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -6.841751092060028 (T) = (0 -4.339745310032135) / Math.Sqrt((0.3209813302598884 / (22)) + (0.03203636975128197 / (17))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (17) - 2, .025) and -0.2536875527900146 = (3.4615844277741004 - 4.339745310032135) / 3.4615844277741004 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

Name	Value
Architecture	arm64
OS	Windows 10.0.19041
Queue	SurfaceWindows
Baseline	605eb6eda2b1e04f79a2f7937506cd9deaec6a9b
Compare	c22b79ae2d1b2a9ca73a42e246e3f3da02e631fe
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.ContainsKeyTrue<Int32, Int32>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Dictionary - Duration of single invocation	5.13 μs	5.97 μs	1.16	0.05	False

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.Collections.ContainsKeyTrue<Int32, Int32>*'

Payloads

Baseline
Compare

Histogram

System.Collections.ContainsKeyTrue<Int32, Int32>.Dictionary(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 5.966407962604771 > 5.876016293639564.
IsChangePoint: Marked as a change because one of 12/10/2022 11:25:25 PM, 1/5/2023 2:25:12 AM, 1/15/2023 4:47:52 PM, 3/25/2023 12:18:49 AM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -14.315755696754838 (T) = (0 -5988.649618249693) / Math.Sqrt((75149.41346588067 / (22)) + (3160.1990532269842 / (17))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (17) - 2, .025) and -0.16749362032056694 = (5129.492370678092 - 5988.649618249693) / 5129.492370678092 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

[AndyAyersMS]

System.Collections.ContainsKeyTrue seems to have regressed.

Commit range only likely change would be dotnet/runtime#83484, but that seems unrelated?

[AndyAyersMS]

Think these are just noisy benchmarks