this post was submitted on 09 Sep 2023
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Programming

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Good performance is not just big O (jmmv.dev)
submitted 1 year ago by [email protected] to c/programming
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Having a fast and responsive app is orthogonal to “knowing your big Os”. Unfortunately, most tech companies over-emphasize algorithms in interviews and downplay systems knowledge, and I believe that’s one reason behind sluggish apps and bloated systems.

I’ve seen this play out repeatedly. Interviewers ask a LeetCode-style coding question, which is then followed by the ritual of discussing time and memory complexity. Candidates ace the answers. But then… their “real” code suffers from subtle yet impactful performance problems.

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[–] [email protected] 16 points 1 year ago

I can improve throughput by 1000x by putting it on 1000 machines

My app is installed on 10000 phones! See how much better it runs!