Yes
It could have taken me several days to cover that much ground doing low level optimisations
skew-aberration on Hacker News
10× Speedup
In the thread “Qwen3.7-Max Ran for 35 Hours on Unknown Hardware and Achieved a 10× Speedup”
Helped: Iterative rewriting of math kernels and verifying with perf counters.
… It reviewed the disassembly and the hardware counters with perf to verify that the changes were working as intended. It could have taken me several days to cover that much ground doing low level optimisations - and I would have spent most of it grappling with gcc, perf, searching for information about particular SIMD instructions, etc.