EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 20·5 min read
Why compiling Rust to WebAssembly is slow
TL;DR
Compiling Rust to WebAssembly with debug information is significantly slower than without, with some cases showing a 40x increase in build time. This issue stems from a known LLVM bug affecting all Rust code compiled to WebAssembly.
✦ Why It Matters
Consider avoiding debug info when compiling Rust to WebAssembly to improve build times.
Key Takeaways
- Enable the proposed LLVM patch for faster Rust compilation to WebAssembly.
- Monitor build times with and without debug info to assess impact.
- Consider using debug = 1 to avoid performance issues.
- Test your crates with the updated toolchain for improved performance.
How It Works
The patch optimizes the handling of DBG_VALUE records by allowing the compiler to count records both upward and forward, reducing unnecessary scans. It also minimizes expensive hash-table lookups for records that are not needed, significantly improving efficiency.