/conditionals.php

<?php
$total_loops = 1000000;
$some_result = false;

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(true) {
    $some_result = true;
  } else {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if true) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(false) {
    $some_result = true;
  } else {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if false) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(true) {
    $some_result = true;
  } else if(false) {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if else if true) time: ' . $t . "\n";


$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(false) {
    $some_result = true;
  } else if(true) {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if else if false) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(true) {
    $some_result = true;
  } elseif(false) {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if elseif true) time: ' . $t . "\n";


$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if(false) {
    $some_result = true;
  } elseif(true) {
    $some_result = false;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(if elseif false) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary true) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true == true) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary positive true) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true != false) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary negative true) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (false) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary false) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true == false) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary positive false) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true != true) ? true : false;
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(ternary negative false) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true == true);
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(boolean positive true) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true != false);
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(boolean negative true) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true == false);
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(boolean positive false) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = (true != true);
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(boolean negative false) time: ' . $t . "\n";


$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  switch (true){
    case true:
      $some_result = 'test';
    break;
    case false:
      $some_result = 'test';
    break;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(switch conditional first) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  switch (false){
    case true:
      $some_result = 'test';
    break;
    case false:
      $some_result = 'test';
    break;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(switch conditional second) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  switch (true){
    case true:
      $some_result = 'test';
    break;
    default:
      $some_result = 'test';
    break;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(switch conditional default not used) time: ' . $t . "\n";

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  switch (false){
    case true:
      $some_result = 'test';
    break;
    default:
      $some_result = 'test';
    break;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(switch conditional default) time: ' . $t . "\n";


$example_array = array('one', 'two', 'three');

$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if (TRUE) {
    $some_result = join(' ', $example_array);
  } else {
    $some_result = join(' ', $example_array);
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(fat if) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  if (TRUE) {
    $some_result = join(' ', $example_array);
  } 
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(skinny if) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $pre_computed = join(' ', $example_array);
  if (TRUE) {
    $some_result = 'asdf';
  } else {
    $some_result = $pre_computed;
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(meduim if) time: ' . $t . "\n";




$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = join(' ', $example_array);
  if (FALSE) {
    $some_result = 'ddd';
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(never if) time: ' . $t . "\n";



$time_start = microtime(true);
for($x = 0; $x < $total_loops; $x++) {
  $some_result = join(' ', $example_array);
  if (TRUE) {
    $some_result = 'ddd';
  }
}
$time_end = microtime(true);
$t = $time_end - $time_start;
echo '(always if) time: ' . $t . "\n";

?>