[Perf] Linux/x64: 4 Regressions on 8/2/2026 5:36:12 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [c25173808a41517b547a0880a424d64aff9c7e80](https://github.com/dotnet/runtime/commit/c25173808a41517b547a0880a424d64aff9c7e80)
Compare | [75c1187a6c4669f5b35f2e900a659b4a55f352c6](https://github.com/dotnet/runtime/commit/75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c25173808a41517b547a0880a424d64aff9c7e80...75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.AddGivenSize<String>

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

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

| 1.70 ms | 2.25 ms | 1.32 | 0.38 | 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.Collections.AddGivenSize*'
```

### System.Collections.AddGivenSize<String>.IDictionary(Size: 512)

#### 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 | [c25173808a41517b547a0880a424d64aff9c7e80](https://github.com/dotnet/runtime/commit/c25173808a41517b547a0880a424d64aff9c7e80)
Compare | [75c1187a6c4669f5b35f2e900a659b4a55f352c6](https://github.com/dotnet/runtime/commit/75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c25173808a41517b547a0880a424d64aff9c7e80...75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.Tests.Perf_PriorityQueue<String, String>

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

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

| 408.56 μs | 530.43 μs | 1.30 | 0.30 | 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.Collections.Tests.Perf_PriorityQueue*'
```

### System.Collections.Tests.Perf_PriorityQueue<String, String>.Dequeue_And_Enqueue(Size: 10)

#### 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 | [c25173808a41517b547a0880a424d64aff9c7e80](https://github.com/dotnet/runtime/commit/c25173808a41517b547a0880a424d64aff9c7e80)
Compare | [75c1187a6c4669f5b35f2e900a659b4a55f352c6](https://github.com/dotnet/runtime/commit/75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c25173808a41517b547a0880a424d64aff9c7e80...75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.TryGetValueFalse<SmallClass, SmallClass>

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

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

| 988.70 μs | 1994.82 μs | 2.02 | 0.25 | 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.Collections.TryGetValueFalse*'
```

### System.Collections.TryGetValueFalse<SmallClass, SmallClass>.ImmutableDictionary(Size: 512)

#### 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 | [c25173808a41517b547a0880a424d64aff9c7e80](https://github.com/dotnet/runtime/commit/c25173808a41517b547a0880a424d64aff9c7e80)
Compare | [75c1187a6c4669f5b35f2e900a659b4a55f352c6](https://github.com/dotnet/runtime/commit/75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c25173808a41517b547a0880a424d64aff9c7e80...75c1187a6c4669f5b35f2e900a659b4a55f352c6)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.IndexerSet<String>

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

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

| 17.90 ms | 25.67 ms | 1.43 | 0.27 | 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.Collections.IndexerSet*'
```

### System.Collections.IndexerSet<String>.SortedDictionary(Size: 512)

#### 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)

Start by running the listed benchmarks with scripts/benchmarks_ci.py using the provided filters and compare commits c25173808a41517b547a0880a424d64aff9c7e80 and 75c1187a6c4669f5b35f2e900a659b4a55f352c6. Read AddGivenSize.cs, Perf_PriorityQueue.cs, and TryGetValueFalse.cs at the referenced lines, then inspect the linked reports and workflow documentation. Done means the four reported regressions are explained and the affected benchmarks no longer regress against the baseline.

Written by the indexing model from the issue text.