* Date: 5 Dec 2002
* License: GPL (General Public License)
* Purpose: This function will run the line of code
* sent as the first parameter and return
* the time it took to complete execution.
* If a second parameter is passed, the
* function will run the code the specified
* number of times, taking the average. This
* will return a better approximation. The
* last parameter allows you to send code to
* be executed between iterations, in case
* something needs to be reset (ie. global
* variables, etc...). The function returns
* the number of seconds
* with a bunch of decimal places.
*/
function benchmark($code, $iter = 1, $reset_code = null)
{
# Determine the overhead in calling the eval function
# You might want to to this multiple times to get better
# precision.
$start = microtime();
eval("");
$end = microtime();
list($start_ms, $start_s) = explode(" ", $start);
list($end_ms, $end_s) = explode(" ", $end);
$overhead = ($end_ms+$end_s) - ($start_ms+$start_s);
# Execute the code the specified number of times
for ($i=0; $i<$iter; $i++) {
$start = microtime();
eval($code);
$end = microtime();
list($start_ms, $start_s) = explode(" ", $start);
list($end_ms, $end_s) = explode(" ", $end);
$time += ($end_ms+$end_s) - ($start_ms+$start_s);
# If reset code was specified, evaluate it
if ($reset_code != null) eval($reset_code);
}
# Return the average speed subtracted by
# the overhead of calling eval()
return ($time/$iter) - $overhead;
}
function dateAdd($data, $qtd, $tipo){
//$data aceita d/m/Y H:i:s
//$qtd é um signed int
//$tipo é uma string q aceita 'dia', 'hora', 'minuto', 'segundo'
$tipos['segundo'] = 1;
$tipos['minuto'] = 60 * $tipos['segundo'];
$tipos['hora'] = 60 * $tipos['minuto'];
$tipos['dia'] = 24 * $tipos['hora'];
$pos = (strpos($data, ' '))?strpos($data, ' '):strlen($data);
$horario = (strpos($data, ' ')!== false)?substr($data, $pos):"";
if (!empty($horario)) {
$horarioArr = explode(":", trim($horario));
}
$horarioArr[0] = (isset($horarioArr[0]))?$horarioArr[0]:0;
$horarioArr[1] = (isset($horarioArr[1]))?$horarioArr[1]:0;
$horarioArr[2] = (isset($horarioArr[2]))?$horarioArr[2]:0;
$dataArr = split('[/-]', substr($data, 0, $pos));
$dataSeg = mktime($horarioArr[0], $horarioArr[1], $horarioArr[2],
$dataArr[1], $dataArr[0], $dataArr[2]);
$qtd = $qtd * $tipos[$tipo];
$dateAddSeg = $dataSeg + $qtd;
return $dateAddSeg;
}
$code1 = '$dataInicial = "01/08/2006 08:04:20";
date("d/m/Y H:i:s", dateAdd($dataInicial, +15, "dia"));
';
$code2 = '$dataInicial = "01/08/2006 08:04:20";
date("d/m/Y H:i:s", strtotime("+15 day",strtotime($dataInicial)));
';
echo "
Usando Data textual
";
echo "Executando 100 vezes
";
echo "Benchmark função: ".benchmark($code1, 100);
echo "
";
echo "Benchmark strtotime(): ".benchmark($code2, 100);
$code3 = '$dataInicial = date("d/m/Y H:i:s","1154573489");
date("d/m/Y H:i:s", dateAdd($dataInicial, +15, "dia"));
';
$code4 = '$dataInicial = "1154573489";
date("d/m/Y H:i:s", strtotime("+15 day",$dataInicial));
';
echo "
Usando timestamp
";
echo "Executando 100 vezes
";
echo "Benchmark função: ".benchmark($code3, 100);
echo "
";
echo "Benchmark strtotime(): ".benchmark($code4, 100);
?>