[Perf] Windows/x64: 1 Regression on 5/25/2023 4:37:39 AM

[performanceautofiler[bot]]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.18362
Queue	TigerWindows
Baseline	2ec9a0ca9b76cd504b3e8d191b78a59a77c136b2
Compare	ceb52b3dd1c7b9ea8d20ad46e7269391d8189614
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Json.Document.Tests.Perf_DocumentParse

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
[Parse - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362/System.Text.Json.Document.Tests.Perf_DocumentParse.Parse(IsDataIndented%3a%20True%2c%20TestRandomAccess%3a%20True%2c%20TestCase%3a%20Json400KB).html>)	8.53 ms	12.12 ms	1.42	0.06	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.Text.Json.Document.Tests.Perf_DocumentParse*'

### Payloads [Baseline]() [Compare]() ### Histogram #### System.Text.Json.Document.Tests.Perf_DocumentParse.Parse(IsDataIndented: True, TestRandomAccess: True, TestCase: Json400KB) ```log ``` ### 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 12.11607875 > 8.97845878125. IsChangePoint: Marked as a change because one of 5/19/2023 10:30:38 AM, 5/24/2023 11:17:37 PM, 5/29/2023 11:58:32 PM falls between 5/21/2023 3:58:09 AM and 5/29/2023 11:58:32 PM. IsRegressionStdDev: Marked as regression because -7.3469537747246285 (T) = (0 -11181815) / Math.Sqrt((1668697160874.3394 / (29)) + (866426562767.1875 / (13))) is less than -2.0210753903043583 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (13) - 2, .025) and -0.3013141785098804 = (8592709.727334382 - 11181815) / 8592709.727334382 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. ``` ### JIT Disasms ### Docs [Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md) [Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

[cincuranet]

Looks like the noisiness correlates with date when dynamic PGO was enabled. cc @AndyAyersMS