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Discussion on: The algorithm behind Ctrl + F.

 
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ZaneHannanAU

That first one is true in js, but in most languages it's false.

Using regex to find string matches is still quite slow, but does work fairly well. In a compiled language, like rust, c, or go, it will be quite consistent, and have a constant time (unless gc interrupts it).

The short of it is: avoid regexes where possible. There are many premade solutions available.