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

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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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