<?php

$client = new \Predis\Client(
    [
        'host' => 'localhost',
        'port' => 6380,
        'password' => 'pass',
        'database' => 1,
    ],
    [
        'prefix' => 'benchmark'
    ]
);

$hashKey = 'hashKey';

$iterationsCount = 100;
$maxFieldCount = 20000;

echo implode(' ', [
    str_pad('Count', 6, ' ', STR_PAD_LEFT),
    str_pad('Set (ms)', 20, ' ', STR_PAD_LEFT),
    str_pad('Del (ms)', 20, ' ', STR_PAD_LEFT),
]) . PHP_EOL;

$client->del([$hashKey]);
for ($hashFieldCount = 0; $hashFieldCount < $maxFieldCount; $hashFieldCount += 1000) {
    $durationSetMs = 0;
    $durationDelMs = 0;
    for ($i = 0; $i < $iterationsCount; $i++) {
        $keys = [];
        for ($j = 0; $j <= $hashFieldCount; $j++) {
            $key = 'hashField' . $j;
            $keys[] = $key;
        }

        // multi set fields to redis hash
        $start = microtime(true);
        $client->hmset($hashKey, array_fill_keys($keys, 42));
        $durationSetMs += (microtime(true) - $start) * 1000 / $iterationsCount;

        // multi delete fields on redis hash
        $start = microtime(true);
        $client->hdel('hashKey', $keys);
        $durationDelMs += (microtime(true) - $start) * 1000 / $iterationsCount;
    }

    echo implode(' ', [
        str_pad(count($keys), 6, ' ', STR_PAD_LEFT),
        str_pad($durationSetMs, 20, ' ', STR_PAD_LEFT),
        str_pad($durationDelMs, 20, ' ', STR_PAD_LEFT),
    ]) . PHP_EOL;
}

$client->del([$hashKey]);