Bug #79856 [NEW]: for() terribly poor performance

From: bugzilla77 at gmail dot com Operating system: Windows 10 Pro PHP version: 8.0.0alpha2 Package: Performance problem Bug Type: Bug Bug description:for() terribly poor performance Description: ------------ for() terribly poor performance Test script: --------------- // --- php <?php $t=microtime(true); $s=0; for($i=0;$i<20000000;$i++){ $s+=$i; } $t=microtime(true)-$t; print(($t*1000).'ms'); ?> // --- javascript <script> t=new Date(); s=0; for(i=0;i<20000000;i++){ s+=i } t=new Date()-t; document.write(t+'ms'); </script> // --- C# using System; namespace ConsoleApp1 { class Program { static void Main(string[] args) { int t = Environment.TickCount; long s = 0; for (int i = 0; i < 20000000; i++) { s += i; } t = Environment.TickCount - t; Console.WriteLine(t+"ms"); Console.ReadKey(); } } } Expected result: ---------------- Performance at the level of other languages. Actual result: -------------- PHP 8.0alpha2: 343ms PHP 7.4: 461ms javascript (Firefox 78.0.2): 58ms C#: 16ms -- Edit bug report at https://bugs.php.net/bug.php?id=79856&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=79856&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=79856&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=79856&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=79856&r=needscript Try newer version: https://bugs.php.net/fix.php?id=79856&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=79856&r=support Expected behavior: https://bugs.php.net/fix.php?id=79856&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=79856&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=79856&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=79856&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=79856&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=79856&r=dst IIS Stability: https://bugs.php.net/fix.php?id=79856&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=79856&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=79856&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=79856&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=79856&r=mysqlcfg