bcremer

Docker Compose scale demo

# start with 3 workers
docker compose up -d --scale worker=3

# verify that nginx and 3 workers are runing
docker compose ps

bcremer

<?php

// Generate prime numbers using the Sieve of Eratosthenes
// Lazily evaluted
// Inspired by: https://www.youtube.com/watch?v=5jwV3zxXc8E

$primes = sieve(nat(2));

foreach ($primes as $value) {
    echo $value . PHP_EOL;

bcremer

Array Unpack
user:	  4.355 ms
system:	      0 ms
wait:	     25 ms
total:	  4.381 ms

Array Merge
user:	  6.798 ms
system:	      0 ms
wait:	      7 ms

bcremer

<?php

abstract class BaseTestCase extends PHPUnit\Framework\TestCase
{
    /**
     * Reset the properties to save memory after each test.
     * @see https://kriswallsmith.net/post/18029585104/faster-phpunit
     */
    protected function tearDown(): void
    {

bcremer

<?php
declare(strict_types=1);

/**
 * @psalm-template TKey
 * @psalm-template TValue
 * @psalm-param iterable<TKey, TValue> $list
 * @psalm-param callable(TValue): bool $filter
 * @psalm-return Generator<TKey, TValue>
 */

bcremer

<?php

declare(strict_types=1);

namespace AppTest;

use PHPUnit\Framework\TestCase;
use Psr\Container\ContainerInterface;
use function assert;
use function strpos;

bcremer

<?php

$measure = function (callable $lambda) {
    
    $rUsage = getrusage();
    $startUTime = $rUsage['ru_utime.tv_usec'] + $rUsage['ru_utime.tv_sec'] * 1000000;
    $startSTime = $rUsage['ru_stime.tv_usec'] + $rUsage['ru_stime.tv_sec'] * 1000000;
    $startHrTime = hrtime(true);

    $lambda();

bcremer

-- Traditional insert
INSERT INTO `campaigns` (name, active) VALUES ('foobar', 1⁾;
 
-- Alternative insert
INSERT INTO `campaigns` SET name = 'foobar', active = 1;

bcremer

<?php
// Live Demo: https://3v4l.org/GWJFZ
// see also: http://0.30000000000000004.com/

var_dump(0.1 + 0.2); // float(0.3)
var_dump(0.3); // float(0.3)
var_dump(0.1 + 0.2 == 0.3); // bool(false) 

// Set the number of significant digits displayed in floating point numbers.
ini_set('precision', 18);

bcremer

<?php
// $clock implements Clock
// interface Clock
// {
//     public function now() : DateTimeImmutable;
// }

// setup
$startDate = Date::fromString('2019-01-04');