paypal付款执行需要15至20秒这是正常时间吗？

Question

我已在我的网站上添加了PayPal付款使用已保存的信用卡创建付款我已经对cURL和SDK进行了测试，请求在15-20秒内给我回复。这是正常的时间吗？

卷曲代码

$accessToken = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

$credit_card = "CARD-xxxxxxxxxxxxxxxxxxxx";
$amt = 5;
$currency = "USD";
$description = "testing time";

$str = "{\n    \"intent\": \"sale\",\n    \"payer\": {\n      \"payment_method\": \"credit_card\",\n      \"funding_instruments\":[\n        {\n          \"credit_card_token\": {\n            \"credit_card_id\": \"$credit_card\"\n          }\n        }\n      ]\n    },\n    \"transactions\":[\n      {\n        \"amount\":{\n          \"total\": \"$amt\",\n          \"currency\": \"$currency\"\n        },\n        \"description\": \"$description\"\n      }\n    ]\n  }";
$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "https://api.sandbox.paypal.com/v1/payments/payment");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $str);
curl_setopt($ch, CURLOPT_POST, 1);

$headers = array();
$headers[] = "Content-Type: application/json";
$headers[] = "Authorization: Bearer ".$accessToken;
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
$result = curl_exec($ch);
curl_close ($ch);
echo $result;

SDK

sdk示例代码 - ＆gt; http://paypal.github.io/PayPal-PHP-SDK/sample/doc/payments/CreatePaymentUsingSavedCard.html