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A comment on Ruby might be faster than you think. Parent comment

Re:Ruby might be faster than you think by JohnBooty on Thursday April 25, 2024 @06:20AM (#40155614) 

    with some being slower than others.
Do we all agree that in practice, these sort of micro-optimizations almost never matter?

It's certainly easy to think of situations where they do matter, but unless your project is FaaS (Fibonacci As A Service) probably not.

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Re:Ruby might be faster than you think by itake on Friday April 26, 2024 @01:31AM (#40166221)
I've seen that more than a few cases where people used the wrong data structure (like array, for O(N)) look ups, instead of a hash.

All the inefficiencies add up, at scale. a 3% inefficiency means you're spending ~3% more on compute. CI takes longer. Dev velocity decreases.

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