[Perf] Linux/x64: 55 Regressions on 6/24/2026 7:31:32 AM +00:00

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	0d1a20fb14109f277df06ebee3f83c964f9dcc61
Compare	e3cbc00cd3e0b511ad36dc240010eb2b9eefc3b7
Diff	Diff
Configs	CompilationMode:wasm, RunKind:micro

Regressions in System.Text.Json.Tests.Perf_Reader

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.22 μs	97.27 μs	1.73	0.25	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	86.68 μs	149.90 μs	1.73	0.31	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.20 μs	11.90 μs	1.65	0.18	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	14.96 μs	24.71 μs	1.65	0.28	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	89.46 μs	147.83 μs	1.65	0.19	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	55.76 μs	90.80 μs	1.63	0.25	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.84 μs	12.75 μs	1.63	0.27	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	14.82 μs	23.93 μs	1.61	0.28	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	561.51 μs	903.67 μs	1.61	0.24	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.27 μs	11.62 μs	1.60	0.25	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	567.52 μs	906.42 μs	1.60	0.22	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	94.52 μs	150.14 μs	1.59	0.23	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	24.69 μs	38.87 μs	1.57	0.26	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	68.35 μs	105.60 μs	1.54	0.22	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	16.24 μs	25.08 μs	1.54	0.16	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	61.84 μs	95.42 μs	1.54	0.27	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	23.88 μs	36.68 μs	1.54	0.28	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	622.75 μs	948.35 μs	1.52	0.24	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	666.54 μs	1014.88 μs	1.52	0.20	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	17.64 μs	26.57 μs	1.51	0.29	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	108.94 μs	163.70 μs	1.50	0.22	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	30.49 μs	45.55 μs	1.49	0.22	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	48.17 μs	71.35 μs	1.48	0.22	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	9.53 μs	14.09 μs	1.48	0.24	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	48.69 μs	71.81 μs	1.47	0.22	False
ReadSpanEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	900.41 ns	1325.14 ns	1.47	0.24	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	25.76 μs	37.83 μs	1.47	0.19	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	50.84 μs	74.59 μs	1.47	0.22	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	969.35 ns	1389.20 ns	1.43	0.23	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	57.00 μs	81.47 μs	1.43	0.22	False
ReadReturnBytes - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	990.94 ns	1403.35 ns	1.42	0.21	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Tests.Perf_Reader*'

Details

System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: BroadTree)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: Json400B)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: LotsOfStrings)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: BroadTree)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: Json400B)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: LotsOfStrings)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json400B)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: BroadTree)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: LotsOfNumbers)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: LotsOfStrings)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: LotsOfNumbers)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: LotsOfStrings)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: BroadTree)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: LotsOfNumbers)

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

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: Json400B)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: DeepTree)

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System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: False, TestCase: HelloWorld)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: LotsOfNumbers)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: DeepTree)

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System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: HelloWorld)

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System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: DeepTree)

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System.Text.Json.Tests.Perf_Reader.ReadReturnBytes(IsDataCompact: False, TestCase: HelloWorld)

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Docs

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

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	0d1a20fb14109f277df06ebee3f83c964f9dcc61
Compare	e3cbc00cd3e0b511ad36dc240010eb2b9eefc3b7
Diff	Diff
Configs	CompilationMode:wasm, RunKind:micro

Regressions in System.Text.Json.Tests.Perf_Segment

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReadSingleSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.70 ms	9.76 ms	1.71	0.26	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.41 μs	94.86 μs	1.68	0.30	False
ReadSingleSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.05 μs	93.26 μs	1.66	0.26	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	567.28 μs	936.84 μs	1.65	0.23	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.66 ms	9.20 ms	1.62	0.25	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.78 ms	9.32 ms	1.61	0.27	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.50 μs	91.02 μs	1.61	0.21	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.77 ms	9.26 ms	1.60	0.23	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	58.31 μs	93.36 μs	1.60	0.19	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.51 μs	90.42 μs	1.60	0.19	False
ReadSingleSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	571.60 μs	909.66 μs	1.59	0.23	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	59.03 μs	93.93 μs	1.59	0.21	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	560.25 μs	890.99 μs	1.59	0.29	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.73 ms	9.10 ms	1.59	0.22	False
ReadMultiSegmentSequenceUsingSpan - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	578.08 μs	914.94 μs	1.58	0.22	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.00 ms	10.98 ms	1.57	0.29	False
ReadSingleSegmentSequenceByN - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	591.08 μs	907.16 μs	1.53	0.27	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	673.52 μs	1022.36 μs	1.52	0.27	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	668.88 μs	1014.42 μs	1.52	0.19	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.06 ms	10.16 ms	1.44	0.23	False
ReadMultiSegmentSequence - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	71.75 μs	100.28 μs	1.40	0.25	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Tests.Perf_Segment*'

Details

System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequence(TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 8192, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequence(TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 4096, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 4096, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 8192, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 8192, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 4096, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 8192, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 4096, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequence(TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 4096, TestCase: Json4KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 8192, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 8192, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequenceUsingSpan(segmentSize: 8192, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 8192, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadSingleSegmentSequenceByN(numberOfBytes: 4096, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 4096, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 8192, TestCase: Json40KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 4096, TestCase: Json400KB)

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System.Text.Json.Tests.Perf_Segment.ReadMultiSegmentSequence(segmentSize: 4096, TestCase: Json4KB)

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Docs

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

---

Run Information

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	0d1a20fb14109f277df06ebee3f83c964f9dcc61
Compare	e3cbc00cd3e0b511ad36dc240010eb2b9eefc3b7
Diff	Diff
Configs	CompilationMode:wasm, RunKind:micro

Regressions in System.Text.Json.Document.Tests.Perf_DocumentParse

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
Parse - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	9.25 μs	13.88 μs	1.50	0.19	False
Parse - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.93 ms	11.22 ms	1.42	0.28	False
Parse - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	10.98 μs	15.54 μs	1.41	0.20	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Document.Tests.Perf_DocumentParse*'

Details

System.Text.Json.Document.Tests.Perf_DocumentParse.Parse(IsDataIndented: True, TestRandomAccess: False, TestCase: BasicJson)

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System.Text.Json.Document.Tests.Perf_DocumentParse.Parse(IsDataIndented: True, TestRandomAccess: False, TestCase: Json400KB)

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System.Text.Json.Document.Tests.Perf_DocumentParse.Parse(IsDataIndented: True, TestRandomAccess: False, TestCase: Json400B)

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Docs

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