Question

我从PHP连续运行多个cURL请求。我运行请求的代码如下：

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
  'Content-Type: application/json')
);
curl_exec($ch);
error_log("curl info: " . print_r(curl_getinfo($ch), true));
curl_close($ch);

第一个请求一切正常。来自curl_getinfo的数据如下所示：

[url] => http://XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[content_type] => text/html; charset=UTF-8
[http_code] => 201
[header_size] => 492
[request_size] => 145
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 0.336019
[namelookup_time] => 0.140008
[connect_time] => 0.17601
[pretransfer_time] => 0.17601
[size_upload] => 2632
[size_download] => 178
[speed_download] => 529
[speed_upload] => 7832
[download_content_length] => 178
[upload_content_length] => 2632
[starttransfer_time] => 0.212012
[redirect_time] => 0

然而，第二个请求大约需要三秒钟。这反映在total_time中，但所有单个时间值都很小：

[url] => http://XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
[content_type] => text/html; charset=UTF-8
[http_code] => 201
[header_size] => 492
[request_size] => 145
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 3.572204
[namelookup_time] => 0
[connect_time] => 0.036002
[pretransfer_time] => 0.036002
[size_upload] => 2632
[size_download] => 178
[speed_download] => 49
[speed_upload] => 736
[download_content_length] => 178
[upload_content_length] => 2632
[starttransfer_time] => 0.068004
[redirect_time] => 0

即使快速连接和转移，导致total_time如此长的原因是什么？我还在服务器上记录了此请求的时间（使用error_log和PHP），并且在我在客户端上调用curl_exec之后3秒才看到请求的开始。以下是来自客户端的PHP和cURL版本信息：

$php -v
PHP 5.2.4-2ubuntu5.14 with Suhosin-Patch 0.9.6.2 (cli) (built: Jan 12 2011 15:54:52)
$curl -V
curl 7.18.0 (x86_64-pc-linux-gnu) libcurl/7.18.0 OpenSSL/0.9.8g zlib/1.2.3.3 libidn/1.1
Protocols: tftp ftp telnet dict ldap ldaps http file https ftps
Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz

PHP cURL total_time缓慢，有多个请求

0 个答案: