An Early Look At LLVM Clang 13 Performance On AMD Zen 3
A pattern was quickly noticed of Clang 13 tending to deliver small but better performance over Clang 12 stable.
For some workloads the Clang 13 performance boost was quite noticeable but on the whole across dozens of C/C++ benchmarks there were mostly minor improvements.
In the occasional benchmark was a loss for Clang 13, but they tended to be quite small.