You should be able to vaguely claim that Python and Java are inherently slower than Rust/C/Whatever. I agree claiming that it is 100x slower is a bit unfounded, but it's pretty easy to go find existing benchmarks that show results like this.
I did search for benchmark comparisons and bumped into one that had 2 orders of magnitude difference.
But naturally, isolated benchmarks can't encapsulate the whole picture because there's a world of difference between testing how fast a loop runs and performance in production.
I guess that arithmetic operations are not very slow in Python, but if you use objects, then Python performs complicated lookups for every field or method access.
