On Fri, Sep 8, 2017 at 8:06 AM, Johannes Schlüter <johan...@schlueters.de> wrote: > On Do, 2017-09-07 at 15:13 -0300, David Rodrigues wrote: >> I understand that array_filter() should costs more than for/foreach >> because >> it is a function call that call another function for each item, while >> the >> for/foreach is a language constructor that works on a way totally >> different >> and its optimized for this kind of job. > > The main cost in that is that array_filter has to create a copy of the > array. An alternative is using an FilterIterator or generator or such > which would make this a pipeline step. (with iterators there are > multiple function calls, while the function descriptor is cached, > making them relatively cheap) I'd focus on improving those. > *cough* https://github.com/phplang/generator/blob/master/src/iterable.php#L64 *cough*
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