noli
Compiler optimizations like function inlining are your friend.
Especially in functional languages, there are a lot of tricks a compiler can use to output more efficient code due to not needing to worry about possible side effects.
Also, in a lot of cases the performance difference does not matter.
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The skerton was (is?) A good entry level grinder that will give you very decent results especially for immersion-type brews. It’s what I started on and what I still use for on the go use cases. I haven’t looked at entry level hand grinders in a while so I guess some developments have happened since I got mine. (Based on a comparison video from james hoffman at the time)
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God yes, I tried a friend’s 1zpresso and the difference in both grind speed and effort is noticable.