Regressions in System.IO.Compression.Brotli

[performanceautofiler]

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	87aa786b3997a23501912abd4654e4fd9958230c
Compare	55bf5d8a28f4a8c519dbc6edfc1d3d64519f530f
Diff	Diff

Regressions in System.IO.Compression.Brotli

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Compress - Duration of single invocation	57.21 μs	2.64 ms	46.07	0.54	False
Compress - Duration of single invocation	38.71 μs	513.81 μs	13.27	0.57	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.IO.Compression.Brotli*'

Details

Payloads

Baseline
Compare

Histogram

System.IO.Compression.Brotli.Compress(level: Optimal, file: "alice29.txt")

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 2.6358665277777775 > 49.21159596309648.
IsChangePoint: Marked as a change because one of 7/15/2022 6:44:31 PM, 7/18/2022 2:17:16 AM falls between 7/8/2022 10:31:34 AM and 7/18/2022 2:17:16 AM.
IsRegressionStdDev: Marked as regression because -418.54307728663485 (T) = (0 -2613168.223104056) / Math.Sqrt((13561413.09071954 / (45)) + (334918084.80197054 / (9))) is less than -2.0066468050606243 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (45) + (9) - 2, .025) and -51.65213098762557 = (49630.81596295141 - 2613168.223104056) / 49630.81596295141 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.IO.Compression.Brotli.Compress(level: Optimal, file: "TestDocument.pdf")

```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 513.8109302995392 > 46.59669667875596.
IsChangePoint: Marked as a change because one of 7/15/2022 6:44:31 PM, 7/18/2022 2:17:16 AM falls between 7/8/2022 10:31:34 AM and 7/18/2022 2:17:16 AM.
IsRegressionStdDev: Marked as regression because -714.8751641957057 (T) = (0 -514246.41449052736) / Math.Sqrt((9051262.153242894 / (45)) + (2145381.6111228354 / (9))) is less than -2.0066468050606243 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (45) + (9) - 2, .025) and -11.756230764376724 = (40313.351489894725 - 514246.41449052736) / 40313.351489894725 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