... all these are fast and (hopefully) well-tested.

No. They are not. They measure the wrong thing and are dog slow. Trust me on this, because I have tried them and measured.

And that is the problem. You--like many others--make definitive statements based upon assumptions rather than tests.

I, personally, never benefit from threads in perl.

Of course you don't. You never use them. How could you?

I will remain your friend with non-threaded perl

Great! I really hope that is so. Please don't take what follows personally.

What I do object to is you--and others--who are variously too scared, too lazy, or threads-are-too-MS, or simply too disinterested, to be bothered to actually try them, and work out what they are good for and what they are not, popping up in any discussion the mentions threads, saying they are useless, broken and will cause your grandchildren to be born with multiple heads.

And all based on something you half-read and totally misunderstood, written by somebody who misheard it from someone they met at a tech conference--or maybe they read it on the back of a cereal packet.

If you don't use them, that's fine. If you can demonstrate alternative solutions that are simpler, quicker, more portable, or more X, please do. Really, please do. I like nothing better than a good head-to-head comparison. But if all you have to 'contribute' to these threads is general, non-specific negativity, it really wears thin fast.