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Some helpful tips for processing a large array.

Greetings Mario. What a marvelous coincidence. I was just writing a question on both topics you address. First, thank you for the free software! MCE is amazing.

I've been tweaking it and noticed that smaller chunks are faster. For some reason 11k is the fastest here. I also noticed some delay in shutdown due to not calling shutdown but didn't know what was wrong. Thanks for the clue. Another issue I've come across is the value of MCE::Util::get_ncpu. On my machine (i7) it says 8 and of course it spawns 8 helpers but for some reason it's faster when I set that to 4:

> time mce volume: 11881376 chunk_size: 16000 max_workers: 8 real 0m19.776s user 0m43.350s sys 0m10.321s > time mce volume: 11881376 chunk_size: 16000 max_workers: 4 real 0m17.615s user 0m27.495s sys 0m4.836s

In reply to Re^6: Getting started with MCE (the Many-Core Engine) by Anonymous Monk
in thread Getting started with MCE (the Many-Core Engine) by Anonymous Monk

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