Online PHP editor | output for 6nFVv

@ 2017-09-22T07:28:14Z

<?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: 0.1238920689s should be faster: 0.1744971275s
Output for 7.1.8: should be slower: 0.1202249527s should be faster: 0.1634619236s
Output for 7.1.7: should be slower: 0.1213901043s should be faster: 0.1755311489s
Output for 7.1.6: should be slower: 0.1211609840s should be faster: 0.2326629162s
Output for 7.1.5: should be slower: 0.1205151081s should be faster: 0.1750900745s
Output for 7.1.4: should be slower: 0.1330058575s should be faster: 0.2064530849s
Output for 7.1.3: should be slower: 0.1311910152s should be faster: 0.1620049477s
Output for 7.1.2: should be slower: 0.1269509792s should be faster: 0.1589879990s
Output for 7.1.1: should be slower: 0.1197161674s should be faster: 0.1621639729s
Output for 7.1.0: should be slower: 0.1522469521s should be faster: 0.2300350666s
Output for 7.0.23: should be slower: 0.1467051506s should be faster: 0.1910989285s
Output for 7.0.22: should be slower: 0.1331298351s should be faster: 0.1785428524s
Output for 7.0.21: should be slower: 0.1442620754s should be faster: 0.1847319603s
Output for 7.0.20: should be slower: 0.1412279606s should be faster: 0.2025671005s
Output for 7.0.19: should be slower: 0.1362941265s should be faster: 0.1788129807s
Output for 7.0.18: should be slower: 0.1303341389s should be faster: 0.1723098755s
Output for 7.0.17: should be slower: 0.1404759884s should be faster: 0.1725080013s
Output for 7.0.16: should be slower: 0.1368660927s should be faster: 0.1901581287s
Output for 7.0.15: should be slower: 0.1375808716s should be faster: 0.1712901592s
Output for 7.0.14: should be slower: 0.1458051205s should be faster: 0.1823260784s
Output for 7.0.13: should be slower: 0.1554269791s should be faster: 0.1670670509s
Output for 7.0.12: should be slower: 0.1552779675s should be faster: 0.1829760075s
Output for 7.0.11: should be slower: 0.1774730682s should be faster: 0.2154219151s
Output for 7.0.10: should be slower: 0.1355590820s should be faster: 0.1720781326s
Output for 7.0.9: should be slower: 0.1308810711s should be faster: 0.1825180054s
Output for 7.0.8: should be slower: 0.1661880016s should be faster: 0.1878988743s
Output for 7.0.7: should be slower: 0.1345350742s should be faster: 0.1730089188s
Output for 7.0.6: should be slower: 0.1387360096s should be faster: 0.2481279373s
Output for 7.0.5: should be slower: 0.2294771671s should be faster: 0.2354249954s
Output for 7.0.4: should be slower: 0.1391520500s should be faster: 0.1766510010s
Output for 7.0.3: should be slower: 0.1385040283s should be faster: 0.1830699444s
Output for 7.0.2: should be slower: 0.1468729973s should be faster: 0.1853961945s
Output for 7.0.1: should be slower: 0.2035930157s should be faster: 0.1969158649s
Output for 7.0.0: should be slower: 0.1381111145s should be faster: 0.1743619442s

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