[Perf] Regressions in System.Numerics.Tests.Perf_BigInteger

[performanceautofiler]

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	86189a04191aa94968642ebd43c79cc026160999
Compare	72f9cb2d3ca03fa84b1aaf2150f7b6a50a24e2be
Diff	Diff

Regressions in System.Numerics.Tests.Perf_BigInteger

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Add - Duration of single invocation	52.02 ns	57.25 ns	1.10	0.03	False
Ctor_ByteArray - Duration of single invocation	96.12 ns	111.24 ns	1.16	0.00	True

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Numerics.Tests.Perf_BigInteger.Add(arguments: 1024,1024 bits)

Description of detection logic

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 57.24644075323194 > 54.30559466438351.
IsChangePoint: Marked as a change because one of 3/17/2022 6:54:53 PM, 3/23/2022 6:35:24 PM, 3/29/2022 11:07:04 AM, 4/20/2022 2:49:46 PM, 5/10/2022 5:59:50 PM, 5/17/2022 3:30:02 AM falls between 5/8/2022 12:35:08 PM and 5/17/2022 3:30:02 AM.
IsRegressionStdDev: Marked as regression because -45.485501441355325 (T) = (0 -57.44434516734507) / Math.Sqrt((0.35189372500502897 / (30)) + (0.23046408347387257 / (38))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (38) - 2, .025) and -0.11810030325369744 = (51.376736953009235 - 57.44434516734507) / 51.376736953009235 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.

```#### System.Numerics.Tests.Perf_BigInteger.Ctor_ByteArray(numberString: 12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890)

```log

Description of detection logic

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 111.23549308799407 > 100.47816185613917.
IsChangePoint: Marked as a change because one of 3/31/2022 1:45:25 PM, 5/11/2022 9:09:01 PM, 5/17/2022 3:30:02 AM falls between 5/8/2022 12:35:08 PM and 5/17/2022 3:30:02 AM.
IsRegressionStdDev: Marked as regression because -76.35936570636092 (T) = (0 -110.60013534182278) / Math.Sqrt((1.398987268187489 / (37)) + (0.09541095814401136 / (30))) is less than -1.997137908391408 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (37) + (30) - 2, .025) and -0.16249548357389804 = (95.14027099856006 - 110.60013534182278) / 95.14027099856006 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 as regression because Edge Detector said so.

Docs

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

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[DrewScoggins]

Only the second test looks like a regression. It seems related to this commit #68091

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Run Information

Architecture	x64
OS	Windows 10.0.19042
Baseline	86189a04191aa94968642ebd43c79cc026160999
Compare	72f9cb2d3ca03fa84b1aaf2150f7b6a50a24e2be
Diff	Diff

Regressions in System.Numerics.Tests.Perf_BigInteger

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Add - Duration of single invocation	52.02 ns	57.25 ns	1.10	0.03	False
Ctor_ByteArray - Duration of single invocation	96.12 ns	111.24 ns	1.16	0.00	True

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Numerics.Tests.Perf_BigInteger.Add(arguments: 1024,1024 bits)

Description of detection logic

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 57.24644075323194 > 54.30559466438351.
IsChangePoint: Marked as a change because one of 3/17/2022 6:54:53 PM, 3/23/2022 6:35:24 PM, 3/29/2022 11:07:04 AM, 4/20/2022 2:49:46 PM, 5/10/2022 5:59:50 PM, 5/17/2022 3:30:02 AM falls between 5/8/2022 12:35:08 PM and 5/17/2022 3:30:02 AM.
IsRegressionStdDev: Marked as regression because -45.485501441355325 (T) = (0 -57.44434516734507) / Math.Sqrt((0.35189372500502897 / (30)) + (0.23046408347387257 / (38))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (38) - 2, .025) and -0.11810030325369744 = (51.376736953009235 - 57.44434516734507) / 51.376736953009235 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.

```#### System.Numerics.Tests.Perf_BigInteger.Ctor_ByteArray(numberString: 12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890)

```log

Description of detection logic

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 111.23549308799407 > 100.47816185613917.
IsChangePoint: Marked as a change because one of 3/31/2022 1:45:25 PM, 5/11/2022 9:09:01 PM, 5/17/2022 3:30:02 AM falls between 5/8/2022 12:35:08 PM and 5/17/2022 3:30:02 AM.
IsRegressionStdDev: Marked as regression because -76.35936570636092 (T) = (0 -110.60013534182278) / Math.Sqrt((1.398987268187489 / (37)) + (0.09541095814401136 / (30))) is less than -1.997137908391408 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (37) + (30) - 2, .025) and -0.16249548357389804 = (95.14027099856006 - 110.60013534182278) / 95.14027099856006 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 as regression because Edge Detector said so.

Docs

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

Author:	performanceautofiler[bot]
Assignees:	EgorBo
Labels:	tenet-performance, tenet-performance-benchmarks, area-CodeGen-coreclr, untriaged, refs/heads/main, RunKind=micro, Windows 10.0.19042, Regression, CoreClr, x64
Milestone:	-

[EgorBo]

Judging by the global history it was just a bi-modal behavior: