Re: Why is Elisp slow?

[Garreau, Alexandre]

elisp is mostly interpreted (contrarily to C which is always compiled to
native code, so directly executed by the CPU) and very very dynamic
afaik, not that much optimized at byte-compilation afaiu from what I
observed, and I guess not that much optimized from the VM point of view…

Also aren’t you talking about the tool you’re asking about the, I think,
previously mentioned profiling features of elisp? Like mentioned in
(info "(elisp) Profiling") (you do `M-x profiler-start' to start and
then after a while `M-x profiler-report' to get the relevant
informations).