PowerShell / PowerShell/PSScriptAnalyzer
PSSA should be crossgen'd
还没有人认领这个 Issue。
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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.
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调研方向
从 PSSA.dll 以及已报告的 CoreCLR crossgen 和 FullCLR ngen 要求开始。重现冷启动和热启动的对比，然后验证相关程序集已预编译，并且一次性启动成本有所改善。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- csharp, powershell
- 领域
- performance, tooling
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- 功能
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- 4/5
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- 3-5 天
- 活跃度
- 停滞
- 描述清晰度
- 基本清楚
- 新手友好度
- 35/100