Simple Benchmark to see performance of string concatenation, sprintf, strtr, and str_replace

benchmark-concatenation-sprintf-strtr-str_replace.php

$iterations = 1000000;
$name = 'Tom';
$date = '13/09/2009';

$t1 = microtime( true );
for ( $i = 0; $i < $iterations; $i ++ ) {
  $str = sprintf( 'Hi %s, you last logged in on %s.', $name, $date );
}
$t2 = microtime( true );
echo 'sprintf: ' . ( $t2 - $t1 );


echo '<br />';


$t1 = microtime( true );
for ( $i = 0; $i < $iterations; $i ++ ) {
  $str = 'Hi ' . $name . ', you last logged in on ' . $date;
}

$t2 = microtime( true );
echo 'concat: ' . ( $t2 - $t1 );


echo '<br />';

$t1 = microtime( true );
for ( $i = 0; $i < $iterations; $i ++ ) {
  $str = strtr( 'Hi %name, you last logged in on %date.', array(
    '%name' => $name,
    '%date' => $date
  ) );
}

$t2 = microtime( true );
echo 'strtr: ' . ( $t2 - $t1 );


echo '<br />';


$t1 = microtime( true );
for ( $i = 0; $i < $iterations; $i ++ ) {

  $str = 'Hi %name, you last logged in on %date.';
  str_replace('%name', $name, $str);
  str_replace('%date', $date, $str);
}

$t2 = microtime( true );
echo 'str_replace: ' . ( $t2 - $t1 );


echo '<br />';