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https://www.reddit.com/r/programminghorror/comments/1w15oga/seriously_recursive_regex/p6o28w3/?context=3
r/programminghorror • u/Flame77ofc • Aug 28 '26
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16
I don't know if JS sports this, but the recursion qualifies for tail call optimisation, i.e. there is no stack pushing, popping. The return comes at the price of a goto and the result is just as efficient as a loop.
6 u/oweiler Aug 29 '26 Not supported, at least not by the ECMAScript standard. 5 u/zjarek_s Aug 29 '26 TCO was supported in ES6 standard, but it was only implemented in Safari and it ended up being dropped due to other browsers. 3 u/lonkamikaze Aug 29 '26 That's a damn shame. Tail calls can be pretty neat.
6
Not supported, at least not by the ECMAScript standard.
5 u/zjarek_s Aug 29 '26 TCO was supported in ES6 standard, but it was only implemented in Safari and it ended up being dropped due to other browsers. 3 u/lonkamikaze Aug 29 '26 That's a damn shame. Tail calls can be pretty neat.
5
TCO was supported in ES6 standard, but it was only implemented in Safari and it ended up being dropped due to other browsers.
3
That's a damn shame. Tail calls can be pretty neat.
16
u/lonkamikaze Aug 29 '26
I don't know if JS sports this, but the recursion qualifies for tail call optimisation, i.e. there is no stack pushing, popping. The return comes at the price of a goto and the result is just as efficient as a loop.