.gitignore

tests
composer.lock
composer.phar
vendor

ArrayMergeEvent.php

<?php

namespace ArrayTest;

use Athletic\AthleticEvent;

class ArrayMergeEvent extends AthleticEvent
{
    private $globals = [];
    private $context = [];

    private $chunkLengthGlobals = 10;
    private $chunkLengthContext = 100;
    private $overlap = 0.2;

    public function setUp()
    {
        for ($i = 0; $i < $this->chunkLengthGlobals; $i += 1) {
            $this->globals['index' . $i] = $i;
        }
        
        $startContext = round($this->chunkLengthGlobals - ($this->overlap * $this->chunkLengthGlobals));
        for ($i = 0; $i < $this->chunkLengthContext; $i += 1) {
            $this->context['index' . ($startContext + $i)] = $i;
        }
    }
    
    protected function getGlobals()
    {
        return $this->globals;
    }

    /**
     * @baseline
     * @iterations 1000
     * @group classmaps-performance
     *
     * @return mixed
     */
    public function arrayForeach()
    {
        $context = $this->context;

        foreach ($this->getGlobals() as $key => $value) {
            if (!array_key_exists($key, $context)) {
                $context[$key] = $value;
            }
        }
        
        return $context;
    }
    
    /**
     * @iterations 1000
     * @group classmaps-performance
     *
     * @return mixed
     */
    public function arraySum()
    {
        $context = $this->context;

        return $context + $this->getGlobals();
    }
    
    /**
     * 
     * @iterations 1000
     * @group classmaps-performance
     *
     * @return mixed
     */
    public function arrayMerge()
    {
        $context = $this->context;
        
        return array_merge($this->getGlobals(), $context);
    }
}

composer.json

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

output.txt

PHP 5.4.17 (cli) (built: Jul 12 2013 21:18:57)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies

10 globals, 10 context, 20% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000047523975] [210,420.10736]
    arraySum                      :            [1,000     ] [0.0000012602806] [793,474.08248] [26.52%]
    arrayMerge                    :            [1,000     ] [0.0000029742718] [336,216.75351] [62.58%]

10 globals, 10 context, 100% overlap  
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000033602715] [297,595.00497]
    arraySum                      :            [1,000     ] [0.0000010020733] [997,931.00167] [29.82%]
    arrayMerge                    :            [1,000     ] [0.0000025753975] [388,289.57600] [76.64%]

10 globals, 100 context, 20% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000083165169] [120,242.64664]
    arraySum                      :            [1,000     ] [0.0000047922134] [208,671.84080] [57.62%]
    arrayMerge                    :            [1,000     ] [0.0000110158920] [90,777.94130] [132.46%]
    
10 globals, 100 context, 100% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000034246445] [292,001.11390]
    arraySum                      :            [1,000     ] [0.0000047318935] [211,331.88895] [138.17%]
    arrayMerge                    :            [1,000     ] [0.0000112292767] [89,052.93106] [327.90%]
    
100 globals, 10 context, 20% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000350146294] [28,559.49122]
    arraySum                      :            [1,000     ] [0.0000053291321] [187,647.81675] [15.22%]
    arrayMerge                    :            [1,000     ] [0.0000110883713] [90,184.57040] [31.67%]

100 globals, 100 context, 20% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000374169350] [26,725.86627]
    arraySum                      :            [1,000     ] [0.0000085887909] [116,430.82390] [22.95%]
    arrayMerge                    :            [1,000     ] [0.0000202937126] [49,276.34578] [54.24%]
    
20 globals, 1000 context, 90% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000520675182] [19,205.83185]
    arraySum                      :            [1,000     ] [0.0000454032421] [22,024.85888] [87.20%]
    arrayMerge                    :            [1,000     ] [0.0001165008545] [8,583.62803] [223.75%]
    
20 globals, 1000 context, 100% overlap
    Method Name                                 Iterations    Average Time      Ops/s    Relative
    ------------------------------  ----------  ------------ --------------   ---------  ---------
    arrayForeach                  : [Baseline] [1,000     ] [0.0000067317486] [148,549.81406]
    arraySum                      :            [1,000     ] [0.0000466761589] [21,424.21363] [693.37%]
    arrayMerge                    :            [1,000     ] [0.0001171631813] [8,535.10453] [1,740.46%]

run.sh

#/bin/sh

mkdir tests
cp ArrayMergeEvent.php tests/
composer install

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