php_var_parse_benchmark.php

<?php

$runBench = function ($val, Closure $callable, string $using) : array {
    $startTime = microtime(true);

    for ($i = 0; $i < 1000000; $i++) {
        $callable($val);
    }

    $elapsedTime = microtime(true) - $startTime;
    echo "Using $using:\t" . $elapsedTime . ' seconds' . PHP_EOL;

    return compact('elapsedTime', 'using');
};

$getFastest = function (array $t1, array $t2) : string {
    $fastest = $t1['elapsedTime'] < $t2['elapsedTime'] ? $t1 : $t2;

    return "Fastest:\t\t{$fastest['using']}" . PHP_EOL;
};

$lb = PHP_EOL;
echo "Starting.. $lb";

// =========================
echo "{$lb}Measuring integer parse $lb";
$val = '10';
$t1 = $runBench($val, function ($val) {
    return (int) $val;
}, '(int) $var');
$t2 = $runBench($val, function ($val) {
    return intval($val);
}, 'intval($var)');
echo $getFastest($t1, $t2);

// =========================
echo "{$lb}Measuring float parse $lb";
$val = '99.9';
$t1 = $runBench($val, function ($val) {
    return (float) $val;
}, '(float) $var');
$t2 = $runBench($val, function ($val) {
    return floatval($val);
}, 'floatval($var)');
echo $getFastest($t1, $t2);

// =========================
echo "{$lb}Measuring string parse $lb";
$val = new class {
    public function __toString() : string
    {
        return 'foo';
    }
};
$t1 = $runBench($val, function ($val) {
    return (string) $val;
}, '(string) $var');
$t2 = $runBench($val, function ($val) {
    return strval($val);
}, 'strval($var)');
echo $getFastest($t1, $t2);

// =========================
echo "{$lb}Measuring boolean parse $lb";
$val = 'any_not_empty';
$t1 = $runBench($val, function ($val) {
    return (bool) $val;
}, '(bool) $var');
$t2 = $runBench($val, function ($val) {
    return boolval($val);
}, 'boolval($var)');
echo $getFastest($t1, $t2);

// =========================
echo "{$lb}Finished.$lb";