Req #79421 [NEW]: foreach (array_keys($arr) as $k) is slow

From: Date: Fri, 27 Mar 2020 19:50:24 +0000
Subject: Req #79421 [NEW]: foreach (array_keys($arr) as $k) is slow
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-226288@lists.php.net to get a copy of this message
From:             michael dot vorisek at email dot cz
Operating system: 
PHP version:      7.4.4
Package:          Performance problem
Bug Type:         Feature/Change Request
Bug description:foreach (array_keys($arr) as $k) is slow

Description:
------------
This is a feature request to optimize:

foreach (array_keys($arr) as $k) {}

instead of building array of keys optimize this in PHP internally to
behave like:

foreach ($arr as $k => $ignore) {}

It is important to optimize it as foreach on keys is very commonly used.


-- 
Edit bug report at https://bugs.php.net/bug.php?id=79421&edit=1
-- 
Fix committed:                    https://bugs.php.net/fix.php?id=79421&r=fixed
Fixed in release:                 https://bugs.php.net/fix.php?id=79421&r=alreadyfixed
Need backtrace:                   https://bugs.php.net/fix.php?id=79421&r=needtrace
Need Reproduce Script:            https://bugs.php.net/fix.php?id=79421&r=needscript
Try newer version:                https://bugs.php.net/fix.php?id=79421&r=oldversion
Not developer issue:              https://bugs.php.net/fix.php?id=79421&r=support
Expected behavior:                https://bugs.php.net/fix.php?id=79421&r=notwrong
Not enough info:                  https://bugs.php.net/fix.php?id=79421&r=notenoughinfo
Submitted twice:                  https://bugs.php.net/fix.php?id=79421&r=submittedtwice
register_globals:                 https://bugs.php.net/fix.php?id=79421&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=79421&r=phptooold
Daylight Savings:                 https://bugs.php.net/fix.php?id=79421&r=dst
IIS Stability:                    https://bugs.php.net/fix.php?id=79421&r=isapi
Install GNU Sed:                  https://bugs.php.net/fix.php?id=79421&r=gnused
Floating point limitations:       https://bugs.php.net/fix.php?id=79421&r=float
No Zend Extensions:               https://bugs.php.net/fix.php?id=79421&r=nozend
MySQL Configuration Error:        https://bugs.php.net/fix.php?id=79421&r=mysqlcfg


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