microbench.php

<?php

$path = 'd';

echo "RouteProvider::getRoutesByPath():\n";
bench('d');
bench('d/d');
bench('d/d/d');
bench('d//d///d');
bench('/d/d/d/d////d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d');
bench('/d/d/d/d///////////////////////////////////////////d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d');
bench(implode('/', array_fill(0, 256, 'd')));

function bench($path) {
  echo "Path: $path\n";
  $runcount = 100000;
  $parts = array_values(array_filter(explode('/', $path), function($value) {
    return $value !== NULL && $value !== '';
  }));
  $part_count = count($parts);


  $t0 = microtime(true);
  for ($i = 0; $i < $runcount; ++$i) {
    $npath = trim(preg_replace('#//+#', '/', $path), '/');
    $parts = explode('/', $npath);
    if (count($parts) != $part_count) {
      echo "Fail\n";
    }
  }

  $t1 = microtime(true);
  echo "preg_replace and trim: " .
    round(($t1 - $t0) * 1000, 2) .
    "\n";

  for ($i = 0; $i < $runcount; ++$i) {
    if (strlen($path) > 512) {
      // don't even try... this takes forever.
      continue;
    }
    $parts = array_values(array_filter(explode('/', $path), function($value) {
      return $value !== NULL && $value !== '';
    }));
    if (count($parts) != $part_count) {
      echo "Fail\n";
    }
  }

  $t2 = microtime(true);
  echo "Closure: " .
    round(($t2 - $t1) * 1000, 2) .
    "\n";

  for ($i = 0; $i < $runcount; ++$i) {
    $parts = array();
    foreach (explode('/', $path) as $value) {
      if ($value !== NULL && $value !== '') {
        $parts[] = $value;
      }
    }
    if (count($parts) != $part_count) {
      echo "Fail\n";
    }
  }


  $t3 = microtime(true);
  echo "Loop: " .
    round(($t3 - $t2) * 1000, 2) .
    "\n";

  for ($i = 0; $i < $runcount; ++$i) {
    $parts =  preg_split('@/+@', $path, NULL, PREG_SPLIT_NO_EMPTY);
    if (count($parts) != $part_count) {
      echo "Fail\n";
    }
  }

  $t4 = microtime(true);
  echo "preg_split: " .
    round(($t4 - $t3) * 1000, 2) .
    "\n";

  echo "\n";
}

output.txt

RouteProvider::getRoutesByPath():
Path: d
preg_replace and trim: 218.09
Closure: 458.16
Loop: 132.25
preg_split: 124.09

Path: d/d
preg_replace and trim: 223.98
Closure: 644.98
Loop: 158.73
preg_split: 142.93

Path: d/d/d
preg_replace and trim: 240.48
Closure: 848.43
Loop: 177.32
preg_split: 152.93

Path: d//d///d
preg_replace and trim: 256.08
Closure: 1439.38
Loop: 224.8
preg_split: 152.36

Path: /d/d/d/d////d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d
preg_replace and trim: 415.87
Closure: 5412.93
Loop: 654.75
preg_split: 414.18

Path: /d/d/d/d///////////////////////////////////////////d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d
preg_replace and trim: 404.83
Closure: 12547.14
Loop: 1173.48
preg_split: 388.63

Path: d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d/d
preg_replace and trim: 2314.46
Closure: 51363.03
Loop: 5599.04
preg_split: 3265.59