<?php function getNumbers($count) { $numbers = range(1, $count); shuffle($numbers); return $numbers; } function sumOfRemaindersOriginal($numbers) { $resSum = 0; $len = count($numbers); if($len == 1) return 0; for($i=0; $i<$len; $i++) for($j=0; $j<$len; $j++) $resSum += $numbers[$i]%$numbers[$j]; return $resSum; } function sumOfRemainders($numbers) { $sum = 0; if (1 === count($numbers)) { return 0; } foreach ($numbers as $a) foreach ($numbers as $b) $sum += $a % $b; return $sum; } print "Setting up "; $start = microtime(true); $numbers = getNumbers(2000); $end = microtime(true); print count($numbers) . " numbers in " . ($end - $start) . "\n"; print "Running 'sumOfRemaindersOriginal' in "; $start = microtime(true); $x = sumOfRemaindersOriginal($numbers); $end = microtime(true); print ($end - $start) . " Result: " . $x . "\n"; print "Running 'sumOfRemainders' in "; $start = microtime(true); $x = sumOfRemainders($numbers); $end = microtime(true); $time = $end - $start; print ($end - $start) . " Result: " . $x . "\n";
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