Unlock LTO
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kateinoigakukun commented
This is an umbrella issue to track our work in high-level for link-time optimization (LTO)
Motivation
- Reduce startup time by reducing code size
- Code size is a critical part of reducing initial (un-cached) startup time as it affects download size and compilation time inside Wasm engine.
- Gain more performance speedup by utilizing cross module information
Sub-tasks
- Embed bitcode info in stdlib and corelibs object files
- Adjust SwiftPM and swift-driver to properly propagate LTO options
- TBD