Static Lookup Table Benchmark

<?php

// benchmarking lookup tables
// static vs non-static

// PHP8.0 results are faster with static

for($j = 1; $j <= 10; $j++) {
    echo "Pass $j", PHP_EOL;
    $start    = microtime(true);
    $startMem = memory_get_usage(true);
    for ($i = 0; $i < 1e7; $i++) {
        $test = search('two');
    }
    $end    = microtime(true);
    $endMem = memory_get_usage(true);
    echo $end - $start, '  ', $endMem - $startMem, PHP_EOL;

    $start    = microtime(true);
    $startMem = memory_get_usage(true);
    for ($i = 0; $i < 1e7; $i++) {
        $test = searchStatic('two');
    }
    $end    = microtime(true);
    $endMem = memory_get_usage(true);
    echo $end - $start, '  ', $endMem - $startMem, PHP_EOL;
}

function search($value): string {
    $table = [
        'one' => 'way',
        'two' => 'ways',
    ];

    return $table[$value] ?? '';
}

function searchStatic($value): string {
    static $table = [
        'one' => 'way',
        'two' => 'ways',
    ];

    return $table[$value] ?? '';
}