[clang] [C++][Modules] A module directive may only appear as the first preprocessing tokens in a file (PR #144233)

[Nikita Popov via cfe-commits]

nikic wrote:

> 1. IIUC, `42935M | 43035M (+0.23%)`does this mean the compiler output binary size increased by 0.23%?

This is the number of instructions retired. It's a metric for compilation time, not binary size.

https://github.com/llvm/llvm-project/pull/144233