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PHP Switch Benchmark
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<?php | |
$iterations = 10000; | |
$options = array('apple', 'banana', 'carrot' ,'date', 'endive'); | |
$color = NULL; | |
// Fill an array with random keys. This ensures | |
// that (a) we use the same keys, and (b) | |
// slowness in the randomizer doesn't impact the | |
// loops (which can happen if entropy collection kicks in) | |
$samples = array(); | |
for ($i = 0; $i < $iterations; ++$i) { | |
$samples[] = $options[rand(0, 4)]; | |
} | |
// Test a switch statement. | |
$start_switch = microtime(TRUE); | |
for ($i = 0; $i < $iterations; ++$i) { | |
$option = $samples[$i]; | |
switch ($option) { | |
case 'apple': | |
$color = 'red'; | |
break; | |
case 'banana': | |
$color = 'yellow'; | |
break; | |
case 'carrot': | |
$color = 'orange'; | |
break; | |
case 'date': | |
$color = 'brown'; | |
break; | |
##case 'endive': | |
## $color = 'green'; | |
## break; | |
default: | |
$color = 'green'; | |
} | |
} | |
$end_switch = microtime(TRUE); | |
$total_switch = $end_switch - $start_switch; | |
printf("Switch:\t%0.6f sec to process %d" . PHP_EOL, $total_switch, $iterations); | |
// Test an array lookup. | |
$start_map = microtime(TRUE); | |
$map = array( | |
'apple' => 'red', | |
'banana' => 'yellow', | |
'carrot' => 'orange', | |
'date' => 'brown', | |
//'endive' => 'green' | |
); | |
for ($i = 0; $i < $iterations; ++$i) { | |
$option = $samples[$i]; | |
if (isset($map[$option])) { | |
$color = $map[$option]; | |
} | |
else { | |
$color = 'green'; | |
} | |
} | |
$end_map = microtime(TRUE); | |
$total_map = $end_map - $start_map; | |
printf("Map:\t%0.6f sec to process %d" . PHP_EOL, $total_map, $iterations); |
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