C++ vs Rust: which is faster?

Follow me on Mastodon: https://hachyderm.io/@fasterthanlime Support me on Patreon or GitHub: https://fasterthanli.me/donate 00:00 What is Advent of Code? 00:48 Python vs Rust 01:19 Interpreters vs JITs 03:03 Buffered I/O 04:27 Day 18 Benchmarks 05:00 How does the code feel? 06:49 Day 19 Benchmarks 07:17 Profiling, disassembling & decompiling 08:14 x86 assembly crash course 12:44 Suddenly SIMD 15:52 Day 19 mystery solved 16:40 Register allocation is hard 18:08 Switching calling conventions 18:31 2x3 != 3x2 19:12 Thanks & sponsored segment Rust & C++ sources for day 19: https://gist.github.com/fasterthanlime/b2e261c3d1492171d6a46edf620a0728 Speculation in JavaScriptCore: https://webkit.org/blog/10308/speculation-in-javascriptcore/