Performance Test: Array to CSV using For vs Implode

array-to-csv-using-for-vs-implode.php

<?php

$arr_numbers = range(1,10000);
$total = count($arr_numbers);

$time_for = microtime(true);

$csv_for = '';
for($i = 0; $i < $total; $i++) {
    if( $i == ($total - 1) ) {
        $csv_for .= strval( $arr_numbers[$i] );
    } else {
        $csv_for .= $arr_numbers[$i] . ',';
    }
}

$time_for = microtime(true) - $time_for;

$time_implode = microtime(true);

$csv_implode = implode(',', $arr_numbers);

$time_implode = microtime(true) - $time_implode;

echo '<h1>Results</h1>';

echo '<h2>Array to CSV using for()</h2>';
echo '<p>' . $csv_for . '</p>';
echo 'Time For: ' . $time_for . ' seconds<br />';

echo '<h2>Array to CSV using implode()</h2>';
echo '<p>' . $csv_implode . '</p>';
echo 'Time Implode: ' . $time_implode . ' seconds<br /><br />';

if( $time_for < $time_implode ) {
    echo 'For() is ' . round( $time_for / $time_implode, 2 ) . 'x faster than implode().';
} else {
    echo 'Implode() is ' . round( $time_for / $time_implode, 2 ) . 'x faster than for().';
}

?>