[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

Improvements in System.Memory.Slice<Byte>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
MemoryStartLengthSpan - Duration of single invocation	10.19 ns	8.76 ns	0.86	0.45	False
ReadOnlyMemoryStartLengthSpan - Duration of single invocation	9.95 ns	5.95 ns	0.60	0.41	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Memory.Slice<Byte>.MemoryStartLengthSpan

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 8.757086013470023 < 9.679131548018633.
IsChangePoint: Marked as a change because one of 3/18/2022 7:38:50 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.
IsImprovementStdDev: Marked as improvement because 9.19852616036699 (T) = (0 -6.892461301006337) / Math.Sqrt((7.061076804998637 / (299)) + (1.2026455933833442 / (20))) is greater than 1.9674756580274855 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (20) - 2, .975) and 0.2786120116184368 = (9.554444226981934 - 6.892461301006337) / 9.554444226981934 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Slice&lt;Byte&gt;.ReadOnlyMemoryStartLengthSpan

```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 5.948741436768693 < 9.453484971255588.
IsChangePoint: Marked as a change because one of 3/17/2022 6:54:53 PM, 5/21/2022 4:54:11 AM, 5/26/2022 4:44:18 AM falls between 5/17/2022 2:28:28 PM and 5/26/2022 4:44:18 AM.
IsImprovementStdDev: Marked as improvement because 6.709880424554659 (T) = (0 -6.965116336981142) / Math.Sqrt((7.554998732233165 / (299)) + (1.7881274994396377 / (19))) is greater than 1.9674995188240387 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (19) - 2, .975) and 0.24972922289074265 = (9.283470114372927 - 6.965116336981142) / 9.283470114372927 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