I tried to resist but eventually I lost my resolve and responded ;-)

What exactly is it benchmarking?

My answer would be matrix multiplication. Ok, his test matrices are too small (which makes it a worst case benchmark). But in the proceedings of the perl workshop there is a diagram where matrix multiplications/s (not simply multiplications/s) are compared to the matrix size. The diagram shows that he tested variable matrix sizes, up to 1000x1000 matrices, and also used a different benchmark metric. PS: I found the diagram on the same server where the test script is, http://data.plan9.de/mat.png

Naturally the coro-version is slower than pure perl. But the interesting thing is how much slower. Threads allow different programming styles or paradigms, for example producer/consumer relationships. How much is the penalty to do it this way instead of the simple iterative way?

...I'll attempt to produce a fair comparison...

I'm anxious to hear those results. I even might show Marc Lehmann the results at the next perl workshop, if he is there.

In reply to Re^11: If I am tied to a db and I join a thread, program chrashes by jethro
in thread If I am tied to a db and I join a thread, program chrashes by lance0r

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