dotnet / dotnet/perf-autofiling-issues
[Perf] Linux/x64: 58 Improvements on 7/28/2026 2:40:15 PM +00:00
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Description
### Run Information
Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [bd240d93b9b967e1ed7ca1c2688ff402ac922d03](https://github.com/dotnet/runtime/commit/bd240d93b9b967e1ed7ca1c2688ff402ac922d03)
Compare | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...975877333c98d9d08bad66670d74accc6047be34)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<StructRecord>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeObjectProperty - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<StructRecord>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<StructRecord>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<StructRecord>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<StructRecord>.SerializeObjectProperty(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 | [ca073c0866e1504313b43781c209f7f680d0ecb3](https://github.com/dotnet/runtime/commit/ca073c0866e1504313b43781c209f7f680d0ecb3)
Compare | [ba10a6ee8aa80fce1bb3e40b57b2b941102107c9](https://github.com/dotnet/runtime/commit/ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ca073c0866e1504313b43781c209f7f680d0ecb3...ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<SimpleStructWithProperties>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeObjectProperty - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<SimpleStructWithProperties>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<SimpleStructWithProperties>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<SimpleStructWithProperties>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<SimpleStructWithProperties>.SerializeObjectProperty(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 | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...975877333c98d9d08bad66670d74accc6047be34)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<IndexViewModel>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeObjectProperty - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<IndexViewModel>.SerializeObjectProperty(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<IndexViewModel>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<IndexViewModel>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<IndexViewModel>.SerializeToString(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 | [ca073c0866e1504313b43781c209f7f680d0ecb3](https://github.com/dotnet/runtime/commit/ca073c0866e1504313b43781c209f7f680d0ecb3)
Compare | [ba10a6ee8aa80fce1bb3e40b57b2b941102107c9](https://github.com/dotnet/runtime/commit/ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ca073c0866e1504313b43781c209f7f680d0ecb3...ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<ClassRecord>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeObjectProperty - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<ClassRecord>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<ClassRecord>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<ClassRecord>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<ClassRecord>.SerializeObjectProperty(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 | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...975877333c98d9d08bad66670d74accc6047be34)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<Location>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeObjectProperty - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<Location>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<Location>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<Location>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<Location>.SerializeObjectProperty(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 | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Diff | [Diff](https://github.com/dotnet/runtime/compare/bd240d93b9b967e1ed7ca1c2688ff402ac922d03...975877333c98d9d08bad66670d74accc6047be34)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<MyEventsListerViewModel>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeObjectProperty - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<MyEventsListerViewModel>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<MyEventsListerViewModel>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<MyEventsListerViewModel>.SerializeToUtf8Bytes(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<MyEventsListerViewModel>.SerializeObjectProperty(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 | [ca073c0866e1504313b43781c209f7f680d0ecb3](https://github.com/dotnet/runtime/commit/ca073c0866e1504313b43781c209f7f680d0ecb3)
Compare | [975877333c98d9d08bad66670d74accc6047be34](https://github.com/dotnet/runtime/commit/975877333c98d9d08bad66670d74accc6047be34)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ca073c0866e1504313b43781c209f7f680d0ecb3...975877333c98d9d08bad66670d74accc6047be34)
Configs | CompilationMode:wasm, RunKind:micro
### Improvements in System.Text.Json.Serialization.Tests.WriteJson<TreeRecord>
Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|
- [SerializeObjectProperty - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToWriter - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToString - Duration of single invocation]()
- 📝 - [Benchmark Source]()
- [ADX - Test Multi Config Graph]()
|
- [SerializeToUtf8Bytes - 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.Text.Json.Serialization.Tests.WriteJson*'
```
### System.Text.Json.Serialization.Tests.WriteJson<TreeRecord>.SerializeObjectProperty(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<TreeRecord>.SerializeToWriter(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<TreeRecord>.SerializeToString(Mode: Reflection)
#### ETL Files
#### Histogram
#### JIT Disasms
### System.Text.Json.Serialization.Tests.WriteJson<TreeRecord>.SerializeToUtf8Bytes(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)
Contributor guide
No contributing guide indexed for this repository
Research direction
Start with the benchmark source at src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs and the benchmarking workflow linked in the report. Run the provided benchmarks_ci.py filter, then compare the linked baseline and test reports to understand the listed improvements. The report does not define a code change or acceptance criterion, so completion would require triage to establish a target.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- linux, python, wasm
- Domain
- performance
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100