Array vs Object comparison

array_dynamic.php

<?php

$time = microtime(true);
$memory = memory_get_usage(true);

$collection = [];
$randSrtring = hash_hmac('md5',rand(0, 1000), 'some key');

for ($i = 0; $i <= 1000000; $i++) {
    $region = [];
    $region['city'] = $randSrtring;
    $region['city_code'] = $randSrtring;
    $region['country'] = $randSrtring;
    $region['country_code'] = $randSrtring;
    array_push($collection, $region);
}

$resultTime = @(microtime(true) - $time);
$resultMemory = @round((memory_get_usage(true) - $memory) / (1024 * 1024));

echo sprintf(
    "Time: %s, Memory: %sMB",
    $resultTime,
    $resultMemory
);

array_predefined.php

<?php

$time = microtime(true);
$memory = memory_get_usage(true);

$collection = [];
$randSrtring = hash_hmac('md5',rand(0, 1000), 'some key');

for ($i = 0; $i <= 1000000; $i++) {
    $region = [
        'city' => $randSrtring,
        'city_code' => $randSrtring,
        'country' => $randSrtring,
        'country_code' => $randSrtring
    ];
    array_push($collection, $region);
}

$resultTime = @(microtime(true) - $time);
$resultMemory = @round((memory_get_usage(true) - $memory) / (1024 * 1024));

echo sprintf(
    "Time: %s, Memory: %sMB",
    $resultTime,
    $resultMemory
);

class.php

<?php

class Region
{
    protected $city;
    protected $country;
    protected $cityCode;
    protected $countryCode;

    /**
     * @return mixed
     */
    public function getCity()
    {
        return $this->city;
    }

    /**
     * @param mixed $city
     */
    public function setCity($city)
    {
        $this->city = $city;
    }

    /**
     * @return mixed
     */
    public function getCountry()
    {
        return $this->country;
    }

    /**
     * @param mixed $country
     */
    public function setCountry($country)
    {
        $this->country = $country;
    }

    /**
     * @return mixed
     */
    public function getCityCode()
    {
        return $this->cityCode;
    }

    /**
     * @param mixed $cityCode
     */
    public function setCityCode($cityCode)
    {
        $this->cityCode = $cityCode;
    }

    /**
     * @return mixed
     */
    public function getCountryCode()
    {
        return $this->countryCode;
    }

    /**
     * @param mixed $countryCode
     */
    public function setCountryCode($countryCode)
    {
        $this->countryCode = $countryCode;
    }
}

$time = microtime(true);
$memory = memory_get_usage(true);

$collection = [];
$randSrtring = hash_hmac('md5',rand(0, 1000), 'some key');

for ($i = 0; $i <= 1000000; $i++) {
    $region = new Region();
    $region->setCity($randSrtring);
    $region->setCityCode($randSrtring);
    $region->setCountry($randSrtring);
    $region->setCountryCode($randSrtring);
    array_push($collection, $region);
}

$resultTime = @(microtime(true) - $time);
$resultMemory = @round((memory_get_usage(true) - $memory) / (1024 * 1024));

echo sprintf(
    "Time: %s, Memory: %sMB",
    $resultTime,
    $resultMemory
);

Test result

PHP: 7.1.2

1 mln records

-DTO-

Time: 0.26642107963562, Memory: 148MB

-Array with dynamic adding keys-

Time: 0.2154221534729, Memory: 390MB

-Array with predefined keys-

Time: 0.18599009513855, Memory: 390MB


10 mln

-DTO-

Time: 3.2697010040283, Memory: 1726MB

-Array with dynamic adding keys-

Time: 4.7362878322601, Memory: 4106MB

-Array with predefined keys-

Time: 3.8427510261536, Memory: 4106MB



PHP: 7.0.11

1 mln

-DTO-

Time: 0.3204300403595, Memory: 148MB

-Array with dynamic adding keys-

Time: 0.36689400672913, Memory: 390MB

-Array with predefined keys-

Time: 0.34257411956787, Memory: 390MB

10 mln

-DTO-

Time: 7.8174288272858, Memory: 1726MB

-Array with dynamic adding keys-

Time: 17.430032014847, Memory: 4106MB

-Array with predefined keys-

Time: 19.937174081802, Memory: 4106MB