[Perf] Changes at 2/15/2022 8:18:05 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	1615de6ccc1290be168c1de290429489c489efde
Compare	a25aa6641b605f1ad28c75cddcfa204f8153abe3
Diff	Diff

Improvements in System.Tests.Perf_String

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Trim - Duration of single invocation	12.58 ns	10.89 ns	0.87	0.22	False
ToLowerInvariant - Duration of single invocation	17.47 ns	14.78 ns	0.85	0.11	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_String.Trim(s: " Test")

Description of detection logic

IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 10.886276227857772 < 12.102446778345083.
IsChangePoint: Marked as a change because one of 12/27/2021 6:47:12 AM, 1/7/2022 4:24:34 PM, 1/11/2022 6:41:22 PM, 2/10/2022 7:02:09 PM, 2/15/2022 5:17:31 AM, 2/22/2022 12:12:47 AM falls between 2/13/2022 12:11:49 PM and 2/22/2022 12:12:47 AM.
IsImprovementStdDev: Marked as improvement because 10.586451882482864 (T) = (0 -10.608580562268294) / Math.Sqrt((0.6998148170215062 / (299)) + (0.09230865503424378 / (42))) is greater than 1.9669864608404333 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (42) - 2, .975) and 0.06299195974851812 = (11.32176044019972 - 10.608580562268294) / 11.32176044019972 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.ToLowerInvariant(s: "TEST")

```log

Description of detection logic

IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 14.778465376928555 < 16.50235694670765.
IsChangePoint: Marked as a change because one of 12/26/2021 4:30:45 AM, 1/19/2022 6:01:43 AM, 1/24/2022 3:33:04 PM, 2/1/2022 8:13:55 AM, 2/7/2022 4:59:24 AM, 2/19/2022 11:51:48 PM, 2/22/2022 12:12:47 AM falls between 2/13/2022 12:11:49 PM and 2/22/2022 12:12:47 AM.
IsImprovementStdDev: Marked as improvement because 27.956763488489248 (T) = (0 -14.91408108553131) / Math.Sqrt((0.5700925324735258 / (299)) + (0.011535352058830132 / (7))) is greater than 1.9677981407170237 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (7) - 2, .975) and 0.1005247981270339 = (16.58086966097109 - 14.91408108553131) / 16.58086966097109 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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