Regressions in System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>

[performanceautofiler]

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	59f14ac45408d557bd6b423e7a9c175adc85e125
Compare	8393c4eb74afecaa70267b2a94b9b94c1d1ae384
Diff	Diff

Regressions in System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
NewDefaultOptions - Duration of single invocation	1.27 μs	1.48 μs	1.16	0.07	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>*'

Related Issues

Regressions

Improvements

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.NewDefaultOptions

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.
IsRegressionWindowed: Marked as regression because we could not find enough baseline builds for window checking.
IsChangePoint: Marked as a change because one of 8/5/2022 12:58:40 PM, 10/6/2022 12:41:43 AM, 10/17/2022 3:19:47 PM, 10/19/2022 4:51:05 PM falls between 10/10/2022 11:56:05 PM and 10/19/2022 4:51:05 PM.
IsRegressionStdDev: Marked as regression because -8.340742740855228 (T) = (0 -1465.5622377774455) / Math.Sqrt((690.7713871981738 / (26)) + (2855.6693825126813 / (6))) is less than -2.0422724562973107 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (26) + (6) - 2, .025) and -0.1462336330881648 = (1278.5894563475254 - 1465.5622377774455) / 1278.5894563475254 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.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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

[EgorBo]

Likely caused by #76782 cc @eiriktsarpalis

[ghost]

Tagging subscribers to this area: @dotnet/area-system-text-json, @gregsdennis
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	59f14ac45408d557bd6b423e7a9c175adc85e125
Compare	8393c4eb74afecaa70267b2a94b9b94c1d1ae384
Diff	Diff

Regressions in System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
NewDefaultOptions - Duration of single invocation	1.27 μs	1.48 μs	1.16	0.07	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>*'

Related Issues

Regressions

Improvements

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.NewDefaultOptions

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.
IsRegressionWindowed: Marked as regression because we could not find enough baseline builds for window checking.
IsChangePoint: Marked as a change because one of 8/5/2022 12:58:40 PM, 10/6/2022 12:41:43 AM, 10/17/2022 3:19:47 PM, 10/19/2022 4:51:05 PM falls between 10/10/2022 11:56:05 PM and 10/19/2022 4:51:05 PM.
IsRegressionStdDev: Marked as regression because -8.340742740855228 (T) = (0 -1465.5622377774455) / Math.Sqrt((690.7713871981738 / (26)) + (2855.6693825126813 / (6))) is less than -2.0422724562973107 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (26) + (6) - 2, .025) and -0.1462336330881648 = (1278.5894563475254 - 1465.5622377774455) / 1278.5894563475254 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.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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

Author:	performanceautofiler[bot]
Assignees:	-
Labels:	area-System.Text.Json
Milestone:	-

[EgorBo]

Likely related regression: dotnet/perf-autofiling-issues#9075

[eiriktsarpalis]

This is expected -- the change in #76782 intentionally regresses performance for that particular benchmark in favor of other scenaria, cf. #76782 (comment).