I remember reading that having Perl compiled with threading support enabled, code execution will slow down whether it actually uses threads or not. However, I cannot find a reference for that anywhere, and would be glad if someone could supply more information on that.
How much of a slow-down am I to expect with a threaded Perl binary? Which situations does it manifest in? Was it just a problem of an older Perl version?
I'm also interested in whether there are any Linux distributions who might ship a threadless Perl binary. I do know of Gentoo already. (I know -- I'm better off compiling my own binary than using the system Perl)