dotnet / dotnet/perf-autofiling-issues
[Perf] Linux/x64: 29 Regressions on 4/27/2026 9:56:03 PM +00:00
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Description
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Memory.Span<Byte>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [Fill - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [IndexOfValue - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [StartsWith - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [LastIndexOfValue - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [IndexOfAnyTwoValues - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [ToArray - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [GetPinnableReference - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [IndexOfValue - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [LastIndexOfValue - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [Reverse - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [IndexOfValue - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [CopyToOverlap - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [Reverse - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Span*'
```
### System.Memory.Span<Byte>.Fill(Size: 4)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.IndexOfValue(Size: 3000)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.StartsWith(Size: 3000)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.LastIndexOfValue(Size: 3000)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.IndexOfAnyTwoValues(Size: 4)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.ToArray(Size: 33)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.GetPinnableReference(Size: 33)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.IndexOfValue(Size: 33)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.LastIndexOfValue(Size: 512)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.Reverse(Size: 3000)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.IndexOfValue(Size: 512)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.CopyToOverlap(Size: 33)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Span<Byte>.Reverse(Size: 33)
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Memory.Slice<Byte>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [ReadOnlyMemorySpanStartLength - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [ReadOnlyMemoryStart - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [MemoryStart - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [MemorySpanStart - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [MemoryStartLength - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
![graph]()
![graph]()
![graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Slice*'
```
### System.Memory.Slice<Byte>.ReadOnlyMemorySpanStartLength
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Slice<Byte>.ReadOnlyMemoryStart
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Slice<Byte>.MemoryStart
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Slice<Byte>.MemorySpanStart
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Memory.Slice<Byte>.MemoryStartLength
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Numerics.Tests.Perf_Vector4
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [DivideBenchmark - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [MinBenchmark - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [CreateFromScalarXYZWBenchmark - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [TransformByQuaternionBenchmark - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
![graph]()
![graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tests.Perf_Vector4*'
```
### System.Numerics.Tests.Perf_Vector4.DivideBenchmark
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Numerics.Tests.Perf_Vector4.MinBenchmark
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Numerics.Tests.Perf_Vector4.CreateFromScalarXYZWBenchmark
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Numerics.Tests.Perf_Vector4.TransformByQuaternionBenchmark
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Buffers.Tests.ReadOnlySequenceTests<Byte>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [IterateForEachMemory - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [IterateTryGetArray - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Buffers.Tests.ReadOnlySequenceTests*'
```
### System.Buffers.Tests.ReadOnlySequenceTests<Byte>.IterateForEachMemory
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Buffers.Tests.ReadOnlySequenceTests<Byte>.IterateTryGetArray
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [MaxMagnitude_Scalar - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [Divide_Scalar - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives*'
```
### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.MaxMagnitude_Scalar(BufferLength: 3079)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Numerics.Tensors.Tests.Perf_NumberTensorPrimitives<Int32>.Divide_Scalar(BufferLength: 3079)
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [FixedTimeEquals_256Bit_SameReference - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals*'
```
### System.Security.Cryptography.Primitives.Tests.Performance.Perf_FixedTimeEquals.FixedTimeEquals_256Bit_SameReference
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in MicroBenchmarks.Serializers.Json_FromString<MyEventsListerViewModel>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [JsonNet_ - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'MicroBenchmarks.Serializers.Json_FromString*'
```
### MicroBenchmarks.Serializers.Json_FromString<MyEventsListerViewModel>.JsonNet_
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
---
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a](https://github.com/dotnet/runtime/commit/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a)
Compare | [3ac6e13b2780bbaf03c62488fced60b9a76e9782](https://github.com/dotnet/runtime/commit/3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aba46e33ea5ddd45d90e5c6a8b46bba6744ddc9a...3ac6e13b2780bbaf03c62488fced60b9a76e9782)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr
### Regressions in System.Tests.Perf_Uri
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [BuilderToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
![graph]()
[Test Report]()
### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md
```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Uri*'
```
### System.Tests.Perf_Uri.BuilderToString
#### ETL Files
#### Histogram
#### JIT Disasms
### Docs
[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)
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