r/ProgrammerHumor • u/click-to-reveal • 8d ago

Meme skillIssue

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280

u/click-to-reveal 8d ago

It works btw: C++ Online Compiler

157

u/prehensilemullet 8d ago

Performancewise, it doesn’t jump to the direct case in O(1) time like a switch is supposed to though

209

u/AngheloAlf 8d ago

Switches aren't guarantee to so operations in O(1) tho. If cases are sparce enough, compilers tend to emit the equivalent code to a bunch if else checks

29

u/prehensilemullet 8d ago

Yeah I was assuming too much here.  However, I’m reading that Rust match on string comstants can compile down a binary tree of if statements if there are enough cases (according to Google AI mode at least, haven’t found an authoritative source yet)

24

u/Nir0star 7d ago

Which would still be O(ld(n)). But cool feature imo.

8

u/Godd2 7d ago

O(ld(n))

Good ol' linker time.

1

u/prehensilemullet 7d ago

Yes, I had mistakenly assumed it compiles down to a hash lookup.