[Perf] Windows/x64: 8 Regressions on 7/13/2025 1:55:01 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [f21eb18e3f2c01dcbfa583eee72e86f1259776af](https://github.com/dotnet/runtime/commit/f21eb18e3f2c01dcbfa583eee72e86f1259776af)
Compare | [e53094dc42d50043567857d490a677e16464785f](https://github.com/dotnet/runtime/commit/e53094dc42d50043567857d490a677e16464785f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f21eb18e3f2c01dcbfa583eee72e86f1259776af...e53094dc42d50043567857d490a677e16464785f)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Xml.Tests.Perf_XmlConvert

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TimeSpan_ToString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Xml.Tests.Perf_XmlConvert.TimeSpan_ToString.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Private.Xml/Perf.XmlConvert.cs#L31-#L32>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 73.24 ns | 77.66 ns | 1.06 | 0.20 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Xml.Tests.Perf_XmlConvert_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Xml.Tests.Perf_XmlConvert.html>)

### 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Xml.Tests.Perf_XmlConvert*'
```

<details>

### System.Xml.Tests.Perf_XmlConvert.TimeSpan_ToString

#### 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)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [645d04972c034b13e2dc676579c39f6b62469744](https://github.com/dotnet/runtime/commit/645d04972c034b13e2dc676579c39f6b62469744)
Compare | [e53094dc42d50043567857d490a677e16464785f](https://github.com/dotnet/runtime/commit/e53094dc42d50043567857d490a677e16464785f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/645d04972c034b13e2dc676579c39f6b62469744...e53094dc42d50043567857d490a677e16464785f)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Tests.Perf_UInt64

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TryParseHex - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Tests.Perf_UInt64.TryParseHex(value%3a%20%22FFFFFFFFFFFFFFFF%22).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.UInt64.cs#L53-#L55>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1RwW7bMAy9B8g/sL7IQd1YSZti8yBgW9euQ1GgaNLtOGg2HWuQpUCi2xjr/r1S7FyqAwVSfE+PjxoJCD2BgM9s3XvCdr4JuZ8/oKt/P/0wdHkx37j+QTqPt7hPn6XusIDk5t1JZuzTdKIDn6wJXSCsJCGpFtMlX67O+Opssdrwj8XivOCL+Yp/4OfLy1POC85nI9LhzgYgqywZpNx1JuKPvH+cNGUT3x3WPm9QVj5vpTLHhtKaWm3jz72RrSrTf+zKtjulJSlr7m2FrABGCh1WLAP22Jk7ZapYDN3Osv9RyHekW+XJOlVK/U2S/KWoiTzSKW+NT6NfIoZsGFUcYnZQL2LIRqliuLJRmBiu2XTyCjtn/2JJsEan0GfwtVO62oRh1yTbXQY/o8sibuLKBhfQPaLvNH15Rie3OJ3k+Su8NGGQkQFOAjkFLzwkCdnrfam7CpME8hyu94FSI9gaaqUDlzJbsF1YFPgDOApyaKqwteh32UhH8BKmhnRoEEeZ+9LqrjXivdx+qHtx0B36SJFGwYJ9GJzux/Qepe8ctmiIzd4A93pJYXsCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 28.07 ns | 40.87 ns | 1.46 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Tests.Perf_UInt64_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Tests.Perf_UInt64.html>)

### 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_UInt64*'
```

<details>

### System.Tests.Perf_UInt64.TryParseHex(value: "FFFFFFFFFFFFFFFF")

#### 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)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [f21eb18e3f2c01dcbfa583eee72e86f1259776af](https://github.com/dotnet/runtime/commit/f21eb18e3f2c01dcbfa583eee72e86f1259776af)
Compare | [e53094dc42d50043567857d490a677e16464785f](https://github.com/dotnet/runtime/commit/e53094dc42d50043567857d490a677e16464785f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f21eb18e3f2c01dcbfa583eee72e86f1259776af...e53094dc42d50043567857d490a677e16464785f)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Linq.Tests.Perf_Enumerable

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WhereSingle_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input%3a%20Array).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L124-#L126>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 169.56 ns | 184.16 ns | 1.09 | 0.13 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Linq.Tests.Perf_Enumerable_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Linq.Tests.Perf_Enumerable.html>)

### 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Linq.Tests.Perf_Enumerable*'
```

<details>

### System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input: Array)

#### 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)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [f21eb18e3f2c01dcbfa583eee72e86f1259776af](https://github.com/dotnet/runtime/commit/f21eb18e3f2c01dcbfa583eee72e86f1259776af)
Compare | [e53094dc42d50043567857d490a677e16464785f](https://github.com/dotnet/runtime/commit/e53094dc42d50043567857d490a677e16464785f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f21eb18e3f2c01dcbfa583eee72e86f1259776af...e53094dc42d50043567857d490a677e16464785f)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TrimStart_CharArr - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Tests.Perf_String.TrimStart_CharArr(s%3a%20%22%20Test%22%2c%20c%3a%20%5b%27%20%27%2c%20%27%e2%80%85%27%5d).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs#L153-#L158>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 12.62 ns | 15.27 ns | 1.21 | 0.13 | False | | |
|<ul><li>[IndexerCheckPathLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Tests.Perf_String.IndexerCheckPathLength.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs#L281-#L293>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 116.56 ns | 138.14 ns | 1.19 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Tests.Perf_String_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Tests.Perf_String_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Tests.Perf_String.html>)

### 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_String*'
```

<details>

### System.Tests.Perf_String.TrimStart_CharArr(s: " Test", c: [' ', ' '])

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_String.IndexerCheckPathLength

#### 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)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22621
Queue | TigerWindows
Baseline | [f21eb18e3f2c01dcbfa583eee72e86f1259776af](https://github.com/dotnet/runtime/commit/f21eb18e3f2c01dcbfa583eee72e86f1259776af)
Compare | [e53094dc42d50043567857d490a677e16464785f](https://github.com/dotnet/runtime/commit/e53094dc42d50043567857d490a677e16464785f)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f21eb18e3f2c01dcbfa583eee72e86f1259776af...e53094dc42d50043567857d490a677e16464785f)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.Perf_LengthBucketsFrozenDictionary

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TryGetValue_True_FrozenDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count%3a%201000%2c%20ItemsPerBucket%3a%205).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 10.66 μs | 14.28 μs | 1.34 | 0.25 | False | | |
|<ul><li>[TryGetValue_True_FrozenDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count%3a%20100%2c%20ItemsPerBucket%3a%205).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1Ry27bMBC8G/A/bH2hjSqWnEYoqoJAGyd9IA1QxEZ7DFhpZbGlSINcJVaT/nuXkn3JZQmSs7MzswYJCAOBhA9i0wfCdrl2xmBJ2tmw/I6+vv+GdkfNZVf+QQqfvPuL9koPAOX75db3n5F+KNPh/dZzeYmYr11nqYBVliXwlScEZh3ZCsgX4v10YliGqgk966gUIekW5+fZeX6W5WerfJu9K1YXRX6xzN+u8uxN9jrLiixbHDs97h03isqRRUo9T+P+E+8vr2zZxH+PdUgbVFVIW6XtCVA6W+tdnNxb1epy/iTWrt1ro6KBW1ehKECQRo+VSEDcdfZG2yo+Mto78S8K4Qy+6EDO61KZK0Xqp6Ym8iivA0c5jzHLWJLRqhxqMqiXsSRHqXI8kqMwOR6L6eQZ9t795tXABr3GkMBlp021ZbMbUu0+gWELcstDhszR32HoDH18QK92OJ2k6TM8NmzkyACvmJw4iwCzGbnrQ2m6CmczSFO4PjClQXA11Nowl7Y7cB0vCsLQHAV5tBVvLeZdNsoTPLJrmI8AeZJ5KJ3pWitfyu3H9yAH3YwjTQal4PiQk+6P11tUofPYoiWx+A+ur319sgIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 1.05 μs | 1.48 μs | 1.41 | 0.19 | False | | |
|<ul><li>[TryGetValue_True_FrozenDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.22621/System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count%3a%2010000%2c%20ItemsPerBucket%3a%205).html>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 163.21 μs | 175.21 μs | 1.07 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_Windows%2010.0.22621_Regression/System.Collections.Perf_LengthBucketsFrozenDictionary.html>)

### 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Perf_LengthBucketsFrozenDictionary*'
```

<details>

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 1000, ItemsPerBucket: 5)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 100, ItemsPerBucket: 5)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 10000, ItemsPerBucket: 5)

#### 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)

</details>

Name	Value
Architecture	x64
OS	Windows 10.0.22621
Queue	TigerWindows
Baseline	f21eb18e3f2c01dcbfa583eee72e86f1259776af
Compare	e53094dc42d50043567857d490a677e16464785f
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
TrimStart_CharArr - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	12.62 ns	15.27 ns	1.21	0.13	False
IndexerCheckPathLength - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	116.56 ns	138.14 ns	1.19	0.02	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
TryGetValue_True_FrozenDictionary - Duration of single invocation ADX - Test Multi Config Graph	10.66 μs	14.28 μs	1.34	0.25	False
TryGetValue_True_FrozenDictionary - Duration of single invocation ADX - Test Multi Config Graph	1.05 μs	1.48 μs	1.41	0.19	False
TryGetValue_True_FrozenDictionary - Duration of single invocation ADX - Test Multi Config Graph	163.21 μs	175.21 μs	1.07	0.01	False

[Perf] Windows/x64: 8 Regressions on 7/13/2025 1:55:01 PM +00:00 #59319

Description

Run Information

Regressions in System.Xml.Tests.Perf_XmlConvert

Repro

System.Xml.Tests.Perf_XmlConvert.TimeSpan_ToString

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Tests.Perf_UInt64

Repro

System.Tests.Perf_UInt64.TryParseHex(value: "FFFFFFFFFFFFFFFF")

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Linq.Tests.Perf_Enumerable

Repro

System.Linq.Tests.Perf_Enumerable.WhereSingle_LastElementMatches(input: Array)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Tests.Perf_String

Repro

System.Tests.Perf_String.TrimStart_CharArr(s: " Test", c: [' ', ' '])

ETL Files

Histogram

JIT Disasms

System.Tests.Perf_String.IndexerCheckPathLength

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.Perf_LengthBucketsFrozenDictionary

Repro

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 1000, ItemsPerBucket: 5)

ETL Files

Histogram

JIT Disasms

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 100, ItemsPerBucket: 5)

ETL Files

Histogram

JIT Disasms

System.Collections.Perf_LengthBucketsFrozenDictionary.TryGetValue_True_FrozenDictionary(Count: 10000, ItemsPerBucket: 5)

ETL Files

Histogram

JIT Disasms

Docs

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