Makes sense; according to Geekbench, 9955XX has about a 25% lead in multi-core over the base M4, and about a 5% lead in multi-core over the base M5. And more cores, so better for parallel Rust compilation.

I'm comparing it to my M2 laptop, but in practice the 9955HX is substantially faster than even the M4 Pro I have in my Mac Mini, about 30%~ or so in wall clock time for Rust compilation.