[Perf] Linux/x64: 21 Improvements on 5/7/2026 3:57:15 PM +00:00

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#72,772 opened on May 12, 2026 1 comment 0 reactions 0 assignees View on GitHub

arch-x64 branch-refs/heads/main compilationmode-tiered kind-micro os-linux perf-improvement runkind-micro runtime-coreclr untriaged

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Stars: 10
Forks: 8
PR merge metrics: PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [cdbf0c2ba8a84fdc9d83f019baa2103a0afd580b](https://github.com/dotnet/runtime/commit/cdbf0c2ba8a84fdc9d83f019baa2103a0afd580b)
Compare | [c3caf4d3163c429efbdefe7756a71702e9e6c982](https://github.com/dotnet/runtime/commit/c3caf4d3163c429efbdefe7756a71702e9e6c982)
Diff | [Diff](https://github.com/dotnet/runtime/compare/cdbf0c2ba8a84fdc9d83f019baa2103a0afd580b...c3caf4d3163c429efbdefe7756a71702e9e6c982)
Configs | CompilationMode:tiered, RunKind:micro

### Improvements in System.Text.Json.Tests.Perf_Depth

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[ReadSpanEmptyLoop - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 9.45 μs | 8.14 μs | 0.86 | 0.08 | False | | |
|

[ReadSpanEmptyLoop - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 1018.37 ns | 893.98 ns | 0.88 | 0.05 | False | | |
|

[ReadSpanEmptyLoop - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 43.63 ns | 38.33 ns | 0.88 | 0.17 | False | | |
|

[ReadSpanEmptyLoop - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 992.19 ns | 881.53 ns | 0.89 | 0.05 | False | | |

![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.Text.Json.Tests.Perf_Depth*'
```

### System.Text.Json.Tests.Perf_Depth.ReadSpanEmptyLoop(Depth: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Tests.Perf_Depth.ReadSpanEmptyLoop(Depth: 65)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Tests.Perf_Depth.ReadSpanEmptyLoop(Depth: 1)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Tests.Perf_Depth.ReadSpanEmptyLoop(Depth: 64)

#### 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

### Improvements in System.Buffers.Text.Tests.Base64Tests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[Base64EncodeDestinationTooSmall - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 34.08 ns | 27.15 ns | 0.80 | 0.24 | False | | |
|

[Base64Encode - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 26.59 ns | 23.83 ns | 0.90 | 0.27 | False | | |
|

[Base64IsValid - Duration of single invocation]()
[ADX - Test Multi Config Graph]()

| 24.31 ns | 22.91 ns | 0.94 | 0.06 | False | | |

![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.Text.Tests.Base64Tests*'
```

### System.Buffers.Text.Tests.Base64Tests.Base64EncodeDestinationTooSmall(NumberOfBytes: 1000)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Base64Tests.Base64Encode(NumberOfBytes: 1000)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Buffers.Text.Tests.Base64Tests.Base64IsValid(NumberOfBytes: 1000)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[Ieee754Remainder_Vector - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 23.56 μs | 19.52 μs | 0.83 | 0.06 | False | | |
|

[Ieee754Remainder_Vector - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 854.60 ns | 708.21 ns | 0.83 | 0.01 | False | | |
|

[Ieee754Remainder_ScalarDivisor - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 921.41 ns | 782.53 ns | 0.85 | 0.01 | False | | |

![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_FloatingPointTensorPrimitives*'
```

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>.Ieee754Remainder_Vector(BufferLength: 3079)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>.Ieee754Remainder_Vector(BufferLength: 128)

#### ETL Files

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#### JIT Disasms

### System.Numerics.Tensors.Tests.Perf_FloatingPointTensorPrimitives<Single>.Ieee754Remainder_ScalarDivisor(BufferLength: 128)

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### Docs

---

### Run Information

### Improvements in System.Tests.Perf_Type

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[GetType_Resolvers - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 74.36 ns | 60.48 ns | 0.81 | 0.14 | False | | |
|

[GetType_Resolvers - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 153.11 ns | 131.24 ns | 0.86 | 0.11 | False | | |
|

[GetType_Resolvers - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 154.83 ns | 133.32 ns | 0.86 | 0.11 | False | | |

![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.Tests.Perf_Type*'
```

### System.Tests.Perf_Type.GetType_Resolvers(input: typeof(int))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Type.GetType_Resolvers(input: typeof(System.Tests.Nested))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Type.GetType_Resolvers(input: typeof(System.Int32[]))

#### ETL Files

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#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Net.Primitives.Tests.CredentialCacheTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[GetCredential_Uri - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 322.65 ns | 182.06 ns | 0.56 | 0.12 | False | | |
|

[GetCredential_Uri - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 265.76 ns | 190.20 ns | 0.72 | 0.13 | False | | |

![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.Net.Primitives.Tests.CredentialCacheTests*'
```

### System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_Uri(uriString: "http://notfound", uriCount: 10)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_Uri(uriString: "http://name5", uriCount: 10)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Text.Perf_Ascii

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[ToUtf16 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 9.87 ns | 5.74 ns | 0.58 | 0.20 | False | | |
|

[ToUtf16 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 4.95 ns | 3.27 ns | 0.66 | 0.06 | False | | |

![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.Text.Perf_Ascii*'
```

### System.Text.Perf_Ascii.ToUtf16(Size: 128)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Perf_Ascii.ToUtf16(Size: 6)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Perf_Convert

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[ToBase64CharArray - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 366.68 ns | 184.46 ns | 0.50 | 0.04 | False | | |
|

[ToBase64String - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 458.01 ns | 271.06 ns | 0.59 | 0.06 | False | | |

![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.Perf_Convert*'
```

### System.Perf_Convert.ToBase64CharArray(binaryDataSize: 1024, formattingOptions: InsertLineBreaks)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Perf_Convert.ToBase64String(formattingOptions: InsertLineBreaks)

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.IO.Tests.Perf_Path

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[GetFileNameWithoutExtension - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 15.83 ns | 12.82 ns | 0.81 | 0.16 | False | | |

![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.IO.Tests.Perf_Path*'
```

### System.IO.Tests.Perf_Path.GetFileNameWithoutExtension

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

---

### Run Information

### Improvements in System.Tests.Perf_Version

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

[Parse3 - Duration of single invocation]()
📝 - [Benchmark Source]()
[ADX - Test Multi Config Graph]()

| 26.79 ns | 25.40 ns | 0.95 | 0.03 | False | | |

![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_Version*'
```

### System.Tests.Perf_Version.Parse3

#### ETL Files

#### Histogram

#### JIT Disasms

### Docs

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[Perf] Linux/x64: 21 Improvements on 5/7/2026 3:57:15 PM +00:00

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