Online PHP editor | output for 3Gr0Y

@ 2017-09-22T07:19:00Z

<?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: 0.1248800755s should be faster: 0.1732161045s
Output for 7.1.8: should be slower: 0.1217160225s should be faster: 0.1697740555s
Output for 7.1.7: should be slower: 0.1208600998s should be faster: 0.1701021194s
Output for 7.1.6: should be slower: 0.1262788773s should be faster: 0.2501759529s
Output for 7.1.5: should be slower: 0.1507329941s should be faster: 0.2164978981s
Output for 7.1.4: should be slower: 0.1433079243s should be faster: 0.2295749187s
Output for 7.1.3: should be slower: 0.1251339912s should be faster: 0.2155079842s
Output for 7.1.2: should be slower: 0.2354059219s should be faster: 0.2788958549s
Output for 7.1.1: should be slower: 0.2258279324s should be faster: 0.2867281437s
Output for 7.1.0: should be slower: 0.1263189316s should be faster: 0.1908869743s
Output for 7.0.23: should be slower: 0.1429870129s should be faster: 0.1888790131s
Output for 7.0.22: should be slower: 0.1360440254s should be faster: 0.2126321793s
Output for 7.0.21: should be slower: 0.1598360538s should be faster: 0.2429108620s
Output for 7.0.20: should be slower: 0.2769291401s should be faster: 0.2943069935s
Output for 7.0.19: should be slower: 0.1422491074s should be faster: 0.2268540859s
Output for 7.0.18: should be slower: 0.1669778824s should be faster: 0.2402698994s
Output for 7.0.17: should be slower: 0.2430510521s should be faster: 0.1984100342s
Output for 7.0.16: should be slower: 0.1418089867s should be faster: 0.2304151058s
Output for 7.0.15: should be slower: 0.2377371788s should be faster: 0.3262858391s
Output for 7.0.14: should be slower: 0.1896648407s should be faster: 0.2277739048s
Output for 7.0.13: should be slower: 0.1336190701s should be faster: 0.1742079258s
Output for 7.0.12: should be slower: 0.1318809986s should be faster: 0.1783728600s
Output for 7.0.11: should be slower: 0.1462941170s should be faster: 0.1730630398s
Output for 7.0.10: should be slower: 0.1364140511s should be faster: 0.2110021114s
Output for 7.0.9: should be slower: 0.1313180923s should be faster: 0.2013590336s
Output for 7.0.8: should be slower: 0.1311480999s should be faster: 0.1693930626s
Output for 7.0.7: should be slower: 0.1418519020s should be faster: 0.1764450073s
Output for 7.0.6: should be slower: 0.1294491291s should be faster: 0.1825408936s
Output for 7.0.5: should be slower: 0.1398007870s should be faster: 0.2633628845s
Output for 7.0.4: should be slower: 0.1502540112s should be faster: 0.1824400425s
Output for 7.0.3: should be slower: 0.1313869953s should be faster: 0.1728708744s
Output for 7.0.2: should be slower: 0.1371090412s should be faster: 0.1686878204s
Output for 7.0.1: should be slower: 0.1351180077s should be faster: 0.1842241287s
Output for 7.0.0: should be slower: 0.1663589478s should be faster: 0.1989748478s

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