memory usage debug

gistfile1.php

 function cur_memory() {   
    $unit=array('b','kb','mb','gb','tb','pb');
    $size=memory_get_usage(TRUE);
    $memory = @round($size/pow(1024,($i=floor(log($size,1024)))),2).' '.$unit[$i];
    return $memory;

}

print cur_memory();
//some_potentially_intensive_function();
print cur_memory();