Online PHP editor | output for XFnjS

@ 2017-12-06T05:30:34Z

<?php
function xrange($start, $end, $step = 1) {
    while ($start <= $end) {
        yield $start;
        $start += $step;
    }
}

function reduce(Generator $iterator, Callable $callback, $initial = null) {
    $result = $initial;
    foreach($iterator as $value) {
        $result = $callback($result, $value);
    }
    return $result;
}

$start = microtime(true);
reduce(xrange(1, 140000), function($r, $v) {return $r + $v;}, 0);
$byGen = microtime(true) - $start;
$start =microtime(true);
array_reduce(range(1,140000), function($r, $v) {return $r + $v;}, 0);
$byNormal = microtime(true) - $start;

$percent = ($byGen - $byNormal)*100/$byNormal;
printf("Generator is %s than normal function %.2f%%.\n", ($byGen > $byNormal ? 'Slower' : 'Faster'), ($percent));

Output for 7.2.0: Generator is Slower than normal function 43.73%.
Output for 7.1.12: Generator is Slower than normal function 21.64%.
Output for 7.1.11: Generator is Slower than normal function 10.20%.
Output for 7.1.10: Generator is Slower than normal function 33.69%.
Output for 7.1.9: Generator is Slower than normal function 35.90%.
Output for 7.1.8: Generator is Slower than normal function 84.84%.
Output for 7.1.4, 7.1.7: Generator is Slower than normal function 40.95%.
Output for 7.1.6: Generator is Slower than normal function 41.40%.
Output for 7.1.5: Generator is Slower than normal function 28.10%.
Output for 7.1.3: Generator is Slower than normal function 178.45%.
Output for 7.1.2: Generator is Slower than normal function 127.42%.
Output for 7.1.1: Generator is Slower than normal function 76.63%.
Output for 7.1.0: Generator is Slower than normal function 112.29%.

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