Do you think that it could be proxied? I mean, optimize foreach (array_keys()...) syntax to not call array_keys() in fact, but a optimized version of foreach to handle key only. I don't know it opcache could do that, and if it already does.
Em qui, 3 de set de 2020 12:12, Levi Morrison via internals < internals@lists.php.net> escreveu: > On Thu, Sep 3, 2020 at 8:32 AM Sara Golemon <poll...@php.net> wrote: > > > > On Thu, Sep 3, 2020 at 4:19 AM Markus Fischer <mar...@fischer.name> > wrote: > > > > > > I currently use foreach (array_keys($array) as $key) { ... } > > > > to avoid complains from code analysers on unused var, is it slower? > > > > > > one argument brought forward initially (sorry, can't find the email > > > right now) is the resource management: array_keys() has to create a > copy > > > [*] which might be an issue depending on the size of data. > > > > > > > > While I like the idea of more explicit syntax to show intent over a mere > > convention of $_ being an ignorable var, I do need to call out the > foreach > > (array_keys(...) argument as being a poor motivator. > > > > IF (and I heavily stress "if" here) this pattern is common among people > > trying to show explicit intent and IF it represents a noticeable > slowdown, > > then the solution for it is for the engine to optimize around that by > > transforming it during compile time. That lets us fix all usages > > instantaneously without user interaction, and more importantly it allows > > users to focus on their code being readable (and thereby maintainable) > > according to whatever coding standards they choose to apply. > > > > Again, that same argument is why I actually like the proposal overall. > Not > > because it's so much more performant, but because it empowers developers > to > > write code in a way that will be most readable and maintainable to them, > > should they happen to just not like the $_ unused var pattern (which is a > > legit thing to dislike). > > > > -Sara > > Question for those who know about opcache optimizations: is it > feasible to avoid fetching the current value if the value is otherwise > unused and the variable-variable features are not used either? > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: https://www.php.net/unsub.php > >