dotnet / dotnet/perf-autofiling-issues

[Perf] Linux/x64: 12 Improvements on 7/28/2026 8:32:51 PM +00:00

Open
#77,489 1 comment 0 reactions 0 assignees View on GitHub
arch-wasm arch-x64 branch-refs/heads/main compilationmode-wasm kind-micro Noise os-linux perf-improvement runkind-micro untriaged
Dominant language
No language data
Stars
10
Forks
8
PR metrics pending

Description

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [00fc09ea5b2e39c46d56fda130b6693e07d449d8](https://github.com/dotnet/runtime/commit/00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>

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

  • [CachedDefaultOptions - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 10.71 μs | 6.72 μs | 0.63 | 0.12 | False | | |
|
  • [NewDefaultOptions - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 15.90 μs | 11.40 μs | 0.72 | 0.11 | False | | |
|
  • [NewCachedCustomConverter - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 17.28 μs | 12.82 μs | 0.74 | 0.14 | False | | |
|
  • [NewCustomizedOptions - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 16.67 μs | 12.52 μs | 0.75 | 0.15 | 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.Serialization.Tests.ColdStartSerialization*'
```

### System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.CachedDefaultOptions

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.NewDefaultOptions

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.NewCachedCustomConverter

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ColdStartSerialization<SimpleStructWithProperties>.NewCustomizedOptions

#### 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 | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [00fc09ea5b2e39c46d56fda130b6693e07d449d8](https://github.com/dotnet/runtime/commit/00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Json.Serialization.Tests.ReadJson<LoginViewModel>

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

  • [DeserializeFromUtf8Bytes - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 6.44 μs | 3.94 μs | 0.61 | 0.19 | False | | |
|
  • [DeserializeFromString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 7.02 μs | 4.46 μs | 0.63 | 0.12 | False | | |
|
  • [DeserializeFromReader - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 8.97 μs | 6.24 μs | 0.70 | 0.15 | 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.Text.Json.Serialization.Tests.ReadJson*'
```

### System.Text.Json.Serialization.Tests.ReadJson<LoginViewModel>.DeserializeFromUtf8Bytes(Mode: Reflection)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadJson<LoginViewModel>.DeserializeFromString(Mode: Reflection)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadJson<LoginViewModel>.DeserializeFromReader(Mode: Reflection)

#### 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 | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [3dad2c9f5b81d9263c01399d8b28c32b979c2da5](https://github.com/dotnet/runtime/commit/3dad2c9f5b81d9263c01399d8b28c32b979c2da5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...3dad2c9f5b81d9263c01399d8b28c32b979c2da5)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Json.Serialization.Tests.ReadJson<Location>

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

  • [DeserializeFromUtf8Bytes - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 19.62 μs | 11.53 μs | 0.59 | 0.18 | False | | |
|
  • [DeserializeFromString - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 20.55 μs | 12.19 μs | 0.59 | 0.14 | False | | |
|
  • [DeserializeFromReader - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 24.65 μs | 17.25 μs | 0.70 | 0.13 | 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.Text.Json.Serialization.Tests.ReadJson*'
```

### System.Text.Json.Serialization.Tests.ReadJson<Location>.DeserializeFromUtf8Bytes(Mode: Reflection)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadJson<Location>.DeserializeFromString(Mode: Reflection)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadJson<Location>.DeserializeFromReader(Mode: Reflection)

#### 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 | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [00fc09ea5b2e39c46d56fda130b6693e07d449d8](https://github.com/dotnet/runtime/commit/00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...00fc09ea5b2e39c46d56fda130b6693e07d449d8)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in MicroBenchmarks.Serializers.Json_ToString<MyEventsListerViewModel>

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

  • [SystemTextJson_Reflection_ - Duration of single invocation]()
  • 📝 - [Benchmark Source]()
  • [ADX - Test Multi Config Graph]()
| 4.17 ms | 2.97 ms | 0.71 | 0.12 | 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 'MicroBenchmarks.Serializers.Json_ToString*'
```

### MicroBenchmarks.Serializers.Json_ToString<MyEventsListerViewModel>.SystemTextJson_Reflection_

#### 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 | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [3dad2c9f5b81d9263c01399d8b28c32b979c2da5](https://github.com/dotnet/runtime/commit/3dad2c9f5b81d9263c01399d8b28c32b979c2da5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...3dad2c9f5b81d9263c01399d8b28c32b979c2da5)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in MicroBenchmarks.Serializers.Json_ToStream<MyEventsListerViewModel>

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

  • [SystemTextJson_Reflection_ - Duration of single invocation]()
  • [ADX - Test Multi Config Graph]()
| 4.34 ms | 3.12 ms | 0.72 | 0.13 | 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 'MicroBenchmarks.Serializers.Json_ToStream*'
```

### MicroBenchmarks.Serializers.Json_ToStream<MyEventsListerViewModel>.SystemTextJson_Reflection_

#### 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)

Contributor guide

No contributing guide indexed for this repository

Research direction

Start with the benchmark sources linked at src/benchmarks/micro/libraries/System.Text.Json/Serializer/ColdStartSerialization.cs and the listed ReadJson source, then run the provided benchmarks_ci.py command. The report shows performance improvements across several benchmarks, but it names no code change, failure, or acceptance criterion, so completion is not defined.

Written by the indexing model from the issue text.

Assessment

Tech stack
python, wasm
Domain
performance, testing
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
20/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.