That improvement is already included in the newest nightly, so it is included in the linked benchmark. It will ship to stable in the 1.57.0 release: https://gi

That improvement is already included in the newest nightly, so it is included in the linked benchmark. It will ship to stable in the 1.57.0 release: https://github.com/rust-lang/rust/pull/88243 https://github.com/rust-lang/rust/pull/88243 Rustc supports running with LLVM versions other than 13.0, which some distros enable, but the official builds of rustc all use LLVM 13.0, a pre-release version in 1.56.0, and the final in 1.57.0 onwards.