Tracking issue: compile cache
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描述
Follow up to https://github.com/nodejs/node/issues/47472 . Some items that can be investigated:
- Initial implementation, enabled via
NODE_COMPILE_CACHEenvironment variable: https://github.com/nodejs/node/pull/52535 - Exposing an API for user code to control the caching https://github.com/nodejs/node/pull/54501
- An API for flushing the cache: https://github.com/nodejs/node/pull/54971
- Support relative/portable cache: https://github.com/nodejs/node/pull/58797
- Embedder API for configuring the storage
- Support reading a list of files to generate cache ahead of time: https://github.com/nodejs/node/issues/58482
- Idle-time cache serialization like what Blink does, to avoid penalizing the first load
- Other hashing algorithm (CRC32 may be good enough for our use case. In the initial implementation, it was chosen because it can be used on no-crypto builds and fast enough. For reference, ccache has used md4 and later BLAKE2b -> BLAKE3)
- Other directory layout (splitting the cache for each file and read on the fly seems to be fast enough and I don't really see I/O showing up in the profile anyway) or using a db (if/when we implement Web Storage?)
- Inode caching like https://github.com/ccache/ccache/pull/577 (note that CRC32 also barely shows up in the profile, it may not worth the complexity).
- Avoid UTF8 transcoding by directly reading the source code as buffer from disk (this needs to dance with CJS loader monkey patching)
- Move the flushing operations off-thread so that they can be done as soon as the code cache is ready and can be done concurrently https://github.com/joyeecheung/node/tree/parallel-compile-cache (this likely tanks the performance for simpler use cases)
- Implement TS -> JS caching https://github.com/nodejs/node/issues/54741
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调研方向
从链接的后续 issue 47472 以及此 tracking issue 中尚未勾选的 compile-cache 项开始。选择一项具体的调查,例如 embedder API 或提前生成缓存,然后在为该项定义完成标准之前,确定相关的 Node.js 入口点和测试。目前该 issue 没有提供任何文件路径或测试路径,因此必须先确定范围。
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评估
- 技术栈
- javascript, node.js, typescript
- 领域
- performance, tooling
- Issue 类型
- 功能
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- 5/5
- 预计耗时
- 一周以上
- 活跃度
- 活跃
- 描述清晰度
- 需要澄清
- 新手友好度
- 35/100