[Perf] Changes at 3/15/2022 4:36:24 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	63fd977f7d57e0c0e434caecfff0dd0a07d2f27f
Compare	466b0f66aafe63a31696c16dca43a727cd4bbce5
Diff	Diff

Improvements in System.Text.Json.Tests.Perf_Reader

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation	7.08 μs	6.57 μs	0.93	0.07	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation	2.90 μs	2.49 μs	0.86	0.02	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: DeepTree)

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 6.573152698800621 < 6.675386868119128.
IsChangePoint: Marked as a change because one of 1/7/2022 4:24:34 PM, 2/3/2022 2:32:50 PM, 3/15/2022 12:53:39 AM, 3/22/2022 12:26:23 PM falls between 3/13/2022 11:50:20 AM and 3/22/2022 12:26:23 PM.
IsImprovementStdDev: Marked as improvement because 12.801989486925464 (T) = (0 -6524.754105901543) / Math.Sqrt((93851.38247100294 / (299)) + (45690.68711264657 / (15))) is greater than 1.9675964973877862 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (15) - 2, .975) and 0.10211702848199221 = (7266.820190242001 - 6524.754105901543) / 7266.820190242001 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: LotsOfStrings)

```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 2.4897204094006615 < 2.6568884127444083.
IsChangePoint: Marked as a change because one of 1/25/2022 5:52:36 PM, 3/17/2022 6:54:53 PM, 3/22/2022 12:26:23 PM falls between 3/13/2022 11:50:20 AM and 3/22/2022 12:26:23 PM.
IsImprovementStdDev: Marked as improvement because 10.320986297665282 (T) = (0 -2513.0619274796813) / Math.Sqrt((4805.2220435387035 / (299)) + (4084.8735485512534 / (5))) is greater than 1.9678502273660254 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (5) - 2, .975) and 0.10597470741042656 = (2810.9517127871354 - 2513.0619274796813) / 2810.9517127871354 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