Bug #74174 [Opn->Asn]: Memory allocation problem

Edit report at https://bugs.php.net/bug.php?id=74174&edit=1 ID: 74174 Updated by: dmitry@php.net Reported by: enleury at gmail dot com Summary: Memory allocation problem -Status: Open +Status: Assigned Type: Bug Package: Performance problem Operating System: Ubuntu PHP Version: 7.1.2 -Assigned To: +Assigned To: dmitry Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2017-02-27 12:31:29] enleury at gmail dot com Description: ------------ Memory is not freed after return from the method. Looks like a heap defragmentation issue (https://bugs.php.net/bug.php?id=53669), but it works fine on 5.x branches. Online test script for 5.x and 7.x branches: https://3v4l.org/2OVeU#output Test script: --------------- <?php function create_docs($amount) { $documents = []; for ($i = 0; $i < $amount; $i++) { $documents[] = ['a' => $i]; } } echo memory_get_usage(true), PHP_EOL; create_docs(5000); echo memory_get_usage(true), PHP_EOL; create_docs(50000); echo memory_get_usage(true), PHP_EOL; create_docs(5000); echo memory_get_usage(true), PHP_EOL; Expected result: ---------------- 262144 524288 524288 524288 Actual result: -------------- 2097152 4194304 20971520 20971520 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74174&edit=1