Posted on May 8th, 2024 byThe Rust 1.78.0 version was released on May 2, 2024. The release announcement mentions that the bundled LLVM version is upgraded to 18, completing the announced u128/i128 change for x86 architectures. It is mentioned that if your code uses 128-bit integers, you may notice runtime performance improvement. Let's dive into how this can happen. The alignment issue with u128/i128 The alignment of a value specifies what addresses are valid to store the value at. A value of al...