note 72534 added to function.debug-backtrace
| From: | kroczuATinteriaDOTpl at osu1 dot php dot net | Date: | Tue, 23 Jan 2007 18:24:35 +0000 |
| Subject: | note 72534 added to function.debug-backtrace | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-122075@lists.php.net to get a copy of this message | ||
<?
// useful and comfortable debug function
// it's show memory usage and time flow between calls, so we can quickly find a block of code
that need optimisation...
// example result:
/*
debug example.php> initialize
debug example.php> code-lines: 39-41 time: 2.0002 mem: 19 KB
debug example.php> code-lines: 41-44 time: 0.0000 mem: 19 KB
debug example.php> code-lines: 44-51 time: 0.6343 mem: 9117 KB
debug example.php> code-lines: 51-53 time: 0.1003 mem: 9117 KB
debug example.php> code-lines: 53-55 time: 0.0595 mem: 49 KB
*/
function debug()
{
static $start_time = NULL;
static $start_code_line = 0;
$call_info = array_shift( debug_backtrace() );
$code_line = $call_info['line'];
$file = array_pop( explode('/', $call_info['file']));
if( $start_time === NULL )
{
print "debug ".$file."> initialize\n";
$start_time = time() + microtime();
$start_code_line = $code_line;
return 0;
}
printf("debug %s> code-lines: %d-%d time: %.4f mem: %d KB\n", $file,
$start_code_line, $code_line, (time() + microtime() - $start_time), ceil( memory_get_usage()/1024));
$start_time = time() + microtime();
$start_code_line = $code_line;
}
////////////////////////////////////////////////
// example:
debug();
sleep(2);
debug();
// soft-code...
$a = 3 + 5;
debug();
// hard-code
for( $i=0; $i<100000; $i++)
{
$dummy['alamakota'.$i] = 'alamakota'.$i;
}
debug();
usleep(100000);
debug();
unset($dummy);
debug();
?>
----
Server IP: 195.136.184.34
Probable Submitter: 83.9.242.73
----
Manual Page -- http://www.php.net/manual/en/function.debug-backtrace.php
Edit -- https://master.php.net/note/edit/72534
Del: integrated -- https://master.php.net/note/delete/72534/integrated
Del: useless -- https://master.php.net/note/delete/72534/useless
Del: bad code -- https://master.php.net/note/delete/72534/bad+code
Del: spam -- https://master.php.net/note/delete/72534/spam
Del: non-english -- https://master.php.net/note/delete/72534/non-english
Del: in docs -- https://master.php.net/note/delete/72534/in+docs
Del: other reasons-- https://master.php.net/note/delete/72534
Reject -- https://master.php.net/note/reject/72534
Search -- https://master.php.net/manage/user-notes.php