note 95178 added to function.fread

I am writing code for file download with speed limitation as was described below. Using sleep in file data sending loop causes browser to hang - it waits for file but download don't starts. If I comment sleep statement - all works. What could be the problem? System: Debian squeeze 2.6.31.6, Apache 2.2.14-3, PHP 5.2.11 ---- Server IP: 64.71.164.2 Probable Submitter: 91.149.174.1 ---- Manual Page -- http://www.php.net/manual/en/function.fread.php Edit -- https://master.php.net/note/edit/95178 Del: integrated -- https://master.php.net/note/delete/95178/integrated Del: useless -- https://master.php.net/note/delete/95178/useless Del: bad code -- https://master.php.net/note/delete/95178/bad+code Del: spam -- https://master.php.net/note/delete/95178/spam Del: non-english -- https://master.php.net/note/delete/95178/non-english Del: in docs -- https://master.php.net/note/delete/95178/in+docs Del: other reasons-- https://master.php.net/note/delete/95178 Reject -- https://master.php.net/note/reject/95178 Search -- https://master.php.net/manage/user-notes.php