[Perf] Changes at 5/21/2022 4:54:11 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	8626da3cc62d940513141b7c58c3495a87bb2bba
Compare	f8323092eb414f9fc09a262132c65e09c5427c10
Diff	Diff

Regressions in System.Text.Perf_Utf8Encoding

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
GetString - Duration of single invocation	282.73 μs	302.07 μs	1.07	0.00	False
GetString - Duration of single invocation	424.64 μs	465.56 μs	1.10	0.00	False
GetString - Duration of single invocation	366.32 μs	411.02 μs	1.12	0.00	True

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Perf_Utf8Encoding*'

Payloads

Baseline
Compare

Histogram

System.Text.Perf_Utf8Encoding.GetString(Input: Cyrillic)

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 302.068647676282 > 296.0255876171875.
IsChangePoint: Marked as a change because one of 4/22/2022 2:26:33 AM, 5/20/2022 10:18:01 PM, 5/26/2022 4:44:18 AM falls between 5/17/2022 2:28:28 PM and 5/26/2022 4:44:18 AM.
IsRegressionStdDev: Marked as regression because -20.191736934180646 (T) = (0 -302382.81942199275) / Math.Sqrt((9357591.766009752 / (22)) + (9716597.157944128 / (20))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (20) - 2, .025) and -0.06808028231942616 = (283108.69924996933 - 302382.81942199275) / 283108.69924996933 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.Text.Perf_Utf8Encoding.GetString(Input: Greek)

```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 465.5566982843137 > 447.9024827871622.
IsChangePoint: Marked as a change because one of 4/16/2022 8:46:33 PM, 5/20/2022 10:18:01 PM, 5/26/2022 4:44:18 AM falls between 5/17/2022 2:28:28 PM and 5/26/2022 4:44:18 AM.
IsRegressionStdDev: Marked as regression because -21.652295840040086 (T) = (0 -455638.4883556538) / Math.Sqrt((8084124.921989473 / (22)) + (29623474.05907008 / (20))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (20) - 2, .025) and -0.06907436911797243 = (426199.0573504939 - 455638.4883556538) / 426199.0573504939 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.Text.Perf_Utf8Encoding.GetString(Input: Chinese)

```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 411.0151902020677 > 378.9725915305398.
IsChangePoint: Marked as a change because one of 5/20/2022 10:18:01 PM, 5/26/2022 4:44:18 AM falls between 5/17/2022 2:28:28 PM and 5/26/2022 4:44:18 AM.
IsRegressionStdDev: Marked as regression because -49.63543308235125 (T) = (0 -416002.2601888737) / Math.Sqrt((13751103.832383173 / (22)) + (10151620.559555558 / (20))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (20) - 2, .025) and -0.14545107305002877 = (363177.67731551494 - 416002.2601888737) / 363177.67731551494 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 as regression because Edge Detector said so.

Docs

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

[kunalspathak]

Dup of dotnet/runtime#69727