What can Rust do that Python can't?

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That got me wondering. So I tried release and debug builds of a convolution over 20 million elements in various Rust implementations, serial and parallel execution. Here are the results:

Implementation                Debug Time(ms)     Release Time(ms)  Speed up

Implementation                Debug Time(ms)     Release Time(ms)  Release build Speed up

zso::convolution:             380640             24195               16
zicog::convolution_slow:      410088              8379               49
dodomorandi::convolution:     475962              8086               59
zicog::convolution_safe:      368243              7980               46 
Abjorn3::convolution:         900673              6619              136
pthm::convolution:            462066              1234              374
zicog::convolution:           428833              1228              349
alice::convolution_serial:    450238              1238              363 
zicog::convolution_fast:      399970              1222              327
alice::convolution_parallel:  120601               375              321

Really, over 300 times slower in debug mode.

This does highlight that the compiler can have a really hard time optimizing your code if you don't write it "just so".

Codes are here if you want to play: GitHub - ZiCog/rust_convolution

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