如何优化PHP开发的微信小程序？

// 使用Memcached缓存数据
$memcached = new Memcached();
$memcached->addServer('localhost', 11211);

$key = 'my_data_key';
$data = $memcached->get($key);

if (!$data) {
    // 数据不存在缓存中，从数据库获取并存入缓存
    $data = get_data_from_database();
    $memcached->set($key, $data, 3600);
}

// 使用$data进行后续操作

// 数据压缩
$data = compress_data(json_encode($data));

// 数据加密
$encrypted_data = encrypt_data($data);

// 解密数据
$decrypted_data = decrypt_data($encrypted_data);

// 解压缩数据
$original_data = json_decode(decompress_data($decrypted_data), true);

$urls = array(
    'http://url1.com',
    'http://url2.com',
    'http://url3.com',
);

$curl_multi_handler = curl_multi_init();
$curl_handlers = array();

foreach ($urls as $url) {
    $curl_handler = curl_init($url);
    curl_setopt($curl_handler, CURLOPT_RETURNTRANSFER, true);

    curl_multi_add_handle($curl_multi_handler, $curl_handler);

    $curl_handlers[] = $curl_handler;
}

$running = null;
do {
    curl_multi_exec($curl_multi_handler, $running);
    curl_multi_select($curl_multi_handler);
} while ($running > 0);

$responses = array();
foreach ($curl_handlers as $curl_handler) {
    $responses[] = curl_multi_getcontent($curl_handler);
    curl_multi_remove_handle($curl_multi_handler, $curl_handler);
}

curl_multi_close($curl_multi_handler);

// 处理返回的数据
foreach ($responses as $response) {
    // 处理每个请求的返回数据
}