PowerShell / PowerShell/PSScriptAnalyzer
PSSA should be crossgen'd
還沒有人認領這個 Issue。
- 主要語言
- C#
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描述
Doing some perf tests and there's a large impact to the first time PSSA.dll is loaded due to JIT.
However, after the initial JIT, execution time is MUCH faster. But for cases where PSSA is invoked just once, it's a huge cost without savings as the JIT is only in memory until the process goes away.
These times are for using PSSA recursively against all scripts in PowerShell repo:
| PowerShell | dotnet | cold start (JIT) | warm start |
|---|---|---|---|
| WinPS 5.1 | .Net 4.7.1 | 111s | 18.6s |
| PSCore6 | .NetCore2.1 | 105s | 16.4s |
| PSCore6 | .NetCore2.1+Tiered | 90s | 16.8s |
Tiered is a new opt-in compilation feature of dotnetcore2.1 that balances startup and runtime optimizations.
My conclusion is that we should crossgen (coreclr) and ngen (fullclr) assemblies.
貢獻指南
從這裡開始
- 先讀完整個 Issue,再讀專案的貢獻指南。
- 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
- Fork 儲存庫,在一個分支上完成修改。
- 送出 Pull Request,並在描述裡引用這個 Issue 編號。
研究方向
從 PSSA.dll 以及已回報的 CoreCLR crossgen 和 FullCLR ngen 要求開始。重現冷啟動和暖啟動的比較,然後確認相關組件已預先編譯,且一次性啟動成本有所改善。
由索引模型根據 Issue 內容生成。
評估
- 技術堆疊
- csharp, powershell
- 領域
- performance, tooling
- Issue 類型
- 功能
- 難度
- 4/5
- 預估耗時
- 3-5 天
- 活躍度
- 停滯
- 描述清晰度
- 基本清楚
- 新手友好度
- 35/100