I have an efficient PC, with SSD, the timings are sufficiently deterministic.
Now I’ve tried with just include_bytes!(“p102_triangles4096.txt”) (wihtout BufReader), the timings are 1.07-1.08 seconds with -Z orbit, and 0.98-0.99 without. About 8-10% slower with -Z orbit.
I have larger programs that with -Z orbit compile 20-30% slower and have binaries about 5-10% bigger.