Not hard to do, I once took some C code, naively converted it to python [0] and it took hours instead of seconds to run.
[0] I wanted to output an image and the C code only ran statistics so I would have had to figure out some random C image library which wasn’t how I wanted to spend my day.
"Or even acknowledge — Anyone else a bit shocked by how well Javascript on V8 performs? I might need to rethink my assumptions…"
https://benchmarksgame-team.pages.debian.net/benchmarksgame/...