`in_array` vs `array_unique` performance example (just a test, not really interesting data)

.gitignore

tests
composer.lock
composer.phar
vendor

ArrayEvent.php

<?php

namespace ArrayTest;

use Athletic\AthleticEvent;

class ArrayEvent extends AthleticEvent
{
    private $arrayWithMatch    = [];
    private $arrayWithoutMatch = [];

    public function setUp()
    {
        $this->arrayWithMatch    = ['foo', 'bar', 'baz', 'tar', 'tab', '*'];
        $this->arrayWithoutMatch = ['foo', 'bar', 'baz', 'tar', 'tab'];
    }

    /**
     * @baseline
     * @iterations 100000
     * @group in_array-performance
     *
     * @return mixed
     */
    public function inArrayPerformanceWithMatch()
    {
        if(! in_array('*', $this->arrayWithMatch)) {
            $this->arrayWithMatch[] = '*';
        }

        return $this->arrayWithMatch;
    }

    /**
     * @iterations 100000
     * @group in_array-performance
     *
     * @return mixed
     */
    public function arrayUniquePerformanceWithMatch()
    {
        $this->arrayWithMatch[] = '*';

        return array_unique($this->arrayWithMatch);
    }

    /**
     * @iterations 100000
     * @group in_array-performance
     *
     * @return mixed
     */
    public function inArrayPerformanceWithoutMatch()
    {
        if(! in_array('*', $this->arrayWithoutMatch)) {
            $this->arrayWithoutMatch[] = '*';
        }

        return $this->arrayWithoutMatch;
    }

    /**
     * @iterations 100000
     * @group in_array-performance
     *
     * @return mixed
     */
    public function arrayUniquePerformanceWithoutMatch()
    {
        $this->arrayWithoutMatch[] = '*';

        return array_unique($this->arrayWithoutMatch);
    }
}

composer.json

{
    "require": {
        "php":               ">=5.4",
        "athletic/athletic": "~0.1.7"
    },
    "autoload": {
        "classmap": [
            "tests/"
        ]
    }
}

output.txt

ArrayTest\ArrayEvent
  in_array-performance
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    inArrayPerformanceWithMatch   : [Baseline] [100,000   ] [0.0000005988693] [1,669,813.36391]
    arrayUniquePerformanceWithMatch:            [100,000   ] [0.0000017494082] [571,621.86288] [292.12%]
    inArrayPerformanceWithoutMatch:            [100,000   ] [0.0000008184958] [1,221,753.44157] [136.67%]
    arrayUniquePerformanceWithoutMatch:            [100,000   ] [0.0000013450456] [743,469.23618] [224.60%]

run.sh

#/bin/sh

curl -s https://getcomposer.org/installer | php
php composer.phar install

mkdir tests
cp ArrayEvent.php tests/

time php -n ./vendor/bin/athletic -p ./tests/ -b ./vendor/autoload.php -f GroupedFormatter