Change default optimizations pass to focus on code size #305
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This PR changes the default optimization option passed to
wasm-opt
from-O3
to-Os
-Oz
.This saves us around 0.2-0.3K according to these rough benchmarks.
The default wasn't set to-Oz
as I saw no noticeable size improvements, and it justtakes more time to run. However, you could also argue that since contracts are in general
quite small the extra time for
-Oz
is negligible so we should enable it anyways.While I could be convinced of this, I'm not sure what hardware other people build on, andthe negative impact the change to
-Oz
could have for them.