[mike_hock]

Contemporary compilers definitely do a lot of CPU-agnostic optimizations that ye olde compilers weren't capable of. The only new CPU features that fundamentally change this are vector instructions, and compilers still suck at autovectorization.

[gpderetta]

Contemporary compilers are "optimized" to optimize for superscalar, fully pipelined, out of order cpus with plenty of ram and caches. Literally nothing in common with a 68k. Also modern compilers wouldn't even know how to produce code for the amiga coprocessors.

This engine very likely is written in hand optimized, clock-exact, asm.