Online PHP editor | output for rWOAa

@ 2017-09-22T07:28:43Z

<?php
class IteratorV1 implements Iterator
{
    private $index;
    public $table;
    function __construct(SplFixedArray $table){
        $this->table = $table;
        $this->rewind();
    }
    function rewind(){
        $this->index = -1;
        $this->next();
    }
    function next(){
        while(
            ++$this->index < $this->table->count() &&
            $this->table->offsetGet($this->index) === NULL
        );
    }
    function valid(){
        return $this->index < $this->table->count();
    }
    function key(){
        return $this->table->offsetGet($this->index); // ->uncommentMe;
    }
    function current(){
        return $this->table->offsetGet($this->index); // ->uncommentMe;
    }
}
class IteratorV2 implements Iterator
{
    private $index;
    private $array;
    private $entry;
    function __construct(SplFixedArray $array){
        $this->array = $array;
        $this->rewind();
    }
    function rewind(){
        for(
            $this->index = 0;
            $this->index < $this->array->count();
            $this->index++
        ){
            $this->entry = $this->array->offsetGet($this->index);
            if($this->entry !== NULL){ return; }
        }
        $this->entry = NULL;
    }
    function next(){
        for(
            $this->index++;
            $this->index < $this->array->count();
            $this->index++
        ){
            $this->entry = $this->array->offsetGet($this->index);
            if($this->entry !== NULL){ return; }
        }
        $this->entry = NULL;
    }
    function valid(){
        return $this->entry !== NULL;
    }
    function key(){
        return $this->entry; //->uncommentMe;
    }
    function current(){
        return $this->entry; //->uncommentMe;
    }
}
class Entry{ public $uncommentMe = 123; }
$array = new SplFixedArray(2 ** 18);
for($i = 0; $i < (2 ** 18) / 2; $i++){
    $array->offsetSet($i * 2, new Entry);
}
echo "should be slower:\n";
$st = microtime(true);
foreach(new IteratorV1($array) as $key => $content){}
echo number_format(microtime(true) - $st, 10) . "s\n";
echo "should be faster:\n";
$st = microtime(true);
foreach(new IteratorV2($array) as $key => $content){}
echo number_format(microtime(true) - $st, 10) . "s\n";

Output for 7.1.9: should be slower: 0.2180140018s should be faster: 0.1911599636s
Output for 7.1.8: should be slower: 0.1923818588s should be faster: 0.1659591198s
Output for 7.1.7: should be slower: 0.1988041401s should be faster: 0.1793370247s
Output for 7.1.6: should be slower: 0.1914160252s should be faster: 0.1629679203s
Output for 7.1.5: should be slower: 0.2299809456s should be faster: 0.1917428970s
Output for 7.1.4: should be slower: 0.1853489876s should be faster: 0.1777570248s
Output for 7.1.3: should be slower: 0.2501449585s should be faster: 0.1745929718s
Output for 7.1.2: should be slower: 0.2101790905s should be faster: 0.1572918892s
Output for 7.1.1: should be slower: 0.2229540348s should be faster: 0.2138180733s
Output for 7.1.0: should be slower: 0.2137529850s should be faster: 0.1662430763s
Output for 7.0.23: should be slower: 0.2221260071s should be faster: 0.2132830620s
Output for 7.0.22: should be slower: 0.2086760998s should be faster: 0.1853790283s
Output for 7.0.21: should be slower: 0.2190098763s should be faster: 0.1827340126s
Output for 7.0.20: should be slower: 0.2853739262s should be faster: 0.2907311916s
Output for 7.0.19: should be slower: 0.2392230034s should be faster: 0.4177320004s
Output for 7.0.18: should be slower: 0.2961478233s should be faster: 0.2096388340s
Output for 7.0.17: should be slower: 0.2002928257s should be faster: 0.1796178818s
Output for 7.0.16: should be slower: 0.2069528103s should be faster: 0.2722890377s
Output for 7.0.15: should be slower: 0.2137150764s should be faster: 0.1721830368s
Output for 7.0.14: should be slower: 0.2112128735s should be faster: 0.2263710499s
Output for 7.0.13: should be slower: 0.2156682014s should be faster: 0.1855950356s
Output for 7.0.12: should be slower: 0.2052068710s should be faster: 0.1746928692s
Output for 7.0.11: should be slower: 0.2043120861s should be faster: 0.1878130436s
Output for 7.0.10: should be slower: 0.2025618553s should be faster: 0.1989119053s
Output for 7.0.9: should be slower: 0.2004520893s should be faster: 0.1993279457s
Output for 7.0.8: should be slower: 0.1915228367s should be faster: 0.1699099541s
Output for 7.0.7: should be slower: 0.1954309940s should be faster: 0.1709170341s
Output for 7.0.6: should be slower: 0.2167890072s should be faster: 0.1806399822s
Output for 7.0.5: should be slower: 0.1890540123s should be faster: 0.1687319279s
Output for 7.0.4: should be slower: 0.2014200687s should be faster: 0.1748130322s
Output for 7.0.3: should be slower: 0.2511858940s should be faster: 0.1766219139s
Output for 7.0.2: should be slower: 0.2020430565s should be faster: 0.1711370945s
Output for 7.0.1: should be slower: 0.2042438984s should be faster: 0.1775519848s
Output for 7.0.0: should be slower: 0.1993510723s should be faster: 0.1726768017s

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