Proposed Multi-Thread Parallel Compilation "MTPC" For LLVM Is Great News
A new proposal for Multi-Thread Parallel Compilation (MTPC) has been introduced for LLVM's ThinLTO link-time optimization. This development aims to enhance compilation efficiency for large LLVM modules by enabling intra-module parallelism. Experimental results indicate a potential reduction of up to 32% in compilation time for full applications.
- ▪The proposal for MTPC aims to improve compilation times for large LLVM modules.
- ▪Current LLVM ThinLTO provides module-level parallelism but struggles with very large modules due to serialization.
- ▪MTPC can split modules at the function level to better utilize multi-core processors.
Opening excerpt (first ~120 words) tap to expand
Proposed Multi-Thread Parallel Compilation "MTPC" For LLVM Is Great News Written by Michael Larabel in LLVM on 22 May 2026 at 06:18 AM EDT. Add A Comment A new proposal volleyed today among LLVM developers is for Multi-Thread Parallel Compilation "MTPC" for the ThinLTO link-time optimization code. This is great news for today's high core count CPUs when looking to compile very large LLVM modules. LLVM ThinLTO currently provides module-level parallelism but for very large modules this can be a compilation bottleneck with today's processors given that code generation and optimizations within individual LLVM modules is largely serialized. What's being proposed now is Multi-Thread Parallel Compilation for LLVM's ThinLTO to offer intra-module parallelism.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Phoronix.