[Perf] Changes at 4/12/2022 3:59:36 PM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	02fae074144be0688b42bbe012dacde60cf9fa7d
Compare	623b1879c46711d89efa55951ad46012cb1e4fb8
Diff	Diff

Improvements in System.Memory.Span<Byte>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
IndexOfValue - Duration of single invocation	28.37 ns	18.88 ns	0.67	0.47	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Span<Byte>*'

Payloads

Baseline
Compare

Histogram

System.Memory.Span<Byte>.IndexOfValue(Size: 512)

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 18.884498301991236 < 24.989285072466078.
IsChangePoint: Marked as a change because one of 4/12/2022 9:30:02 AM, 4/19/2022 4:53:57 AM falls between 4/10/2022 3:30:35 PM and 4/19/2022 4:53:57 AM.
IsImprovementStdDev: Marked as improvement because 21.529294926030826 (T) = (0 -19.7708871417868) / Math.Sqrt((3.6081527744868773 / (299)) + (1.6056483959303394 / (24))) is greater than 1.967381707010986 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (24) - 2, .975) and 0.23430804494074856 = (25.820941451914397 - 19.7708871417868) / 25.820941451914397 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

### Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	02fae074144be0688b42bbe012dacde60cf9fa7d
Compare	623b1879c46711d89efa55951ad46012cb1e4fb8
Diff	Diff

Improvements in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Utf8JsonReaderCommentParsing - Duration of single invocation	557.51 ns	480.68 ns	0.86	0.47	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.Utf8JsonReaderCommentsTests*'

Payloads

Baseline
Compare

Histogram

System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Allow, SegmentSize: 0, TestCase: LongSingleLine)

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 480.6794529282978 < 531.2846107682824.
IsChangePoint: Marked as a change because one of 4/12/2022 9:30:02 AM, 4/19/2022 4:53:57 AM falls between 4/10/2022 3:30:35 PM and 4/19/2022 4:53:57 AM.
IsImprovementStdDev: Marked as improvement because 18.117559875518893 (T) = (0 -494.02991817103293) / Math.Sqrt((1937.1423948003824 / (263)) + (602.3468454191889 / (24))) is greater than 1.968322603028609 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (263) + (24) - 2, .975) and 0.17283616818584777 = (597.2576401068173 - 494.02991817103293) / 597.2576401068173 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

[AndyAyersMS]

No obvious explanation. Possibly dotnet/runtime#67458