[rdtsc]

> It's not an unresolved question whether idiomatic Python is slower than idiomatic C/C++ for solving comparable problems. Python is much, much slower than C.

The real question is does it matter for a particular project.

If it is a desktop GUI. Does it matter if you write it in C++ and the time from button click to status update is 5usec or 1msec?

If you are receiving 10 messages per second, parsing out json and sending back a response or saving it to disk, does it always matter that it all happens in 10msec instead of 11msec. Maybe it does, I found it often doesn't.

[Qantourisc]

Yes battery power and general speed. On the other hand, it's hard to sacrifice more/better programs over speed; but IMO it does matter.