#47477 [NEW]: php_curl_stream_read() unnecessarily sleeps 15 secs under heavy load

From: g dot bonacci at libero dot it Operating system: linux PHP version: 5.3CVS-2009-02-23 (CVS) PHP Bug Type: Performance problem Bug description: php_curl_stream_read() unnecessarily sleeps 15 secs under heavy load Description: ------------ php_curl_stream_read() in ext/curl/streams.c always calls select() after firing up a connection. however, when the php client is under heavy load, the server might have already responded, and the last call to curl_multi_perform() before entering the loop might have received all the data and closed the connection. at this point, curl_multi_fdset() in the loop returns maxfs == -1, and the following select turns into a pointless 15 sec sleep. please see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514832 for reference. a patch is available at http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=php.curlstream.patch;att=1;bug=514832 -- Edit bug report at http://bugs.php.net/?id=47477&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=47477&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=47477&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=47477&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=47477&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47477&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=47477&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=47477&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=47477&r=needscript Try newer version: http://bugs.php.net/fix.php?id=47477&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=47477&r=support Expected behavior: http://bugs.php.net/fix.php?id=47477&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=47477&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=47477&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=47477&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=47477&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=47477&r=dst IIS Stability: http://bugs.php.net/fix.php?id=47477&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=47477&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=47477&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=47477&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=47477&r=mysqlcfg