The HTTPS CURL get slower than HTTP CURL

[sh2012.aps]

i am using the
url = "https://prd.aps.net/cm/json/login.json?username=[e-mail]&pass=ca4433$$&apikey=1dd80ss107s3ad9593c857cc6d14d3a3"

Note:: if iam using the http as a protocol it just grab the values in a few seconds(3 to 4) but using https its a big issue around 40 sec it takes when i am calling curl_easy_perform(curl) why so? please take a part in it.
Thanks.

my code snippet is as follows please try to find if anyone knows better.

     curl_global_init(CURL_GLOBAL_ALL);
     curl = curl_easy_init();

    struct data config; 
    config.trace_ascii = 1; /* enable ascii tracing */ 
    struct curl_slist *chunk = NULL;
    curl_slist_append( chunk, "Content-Type: application/json");

    curl = curl_easy_init();

    struct AppMemoryStruct chunk1; 
    chunk1.memory = (char *)malloc(1);  /* will be grown as needed by the realloc above */ 
    chunk1.size = 0;    /* no data at this point */ 

     if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url.GetPlatformString().c_str());

        curl_easy_setopt(curl,CURLOPT_SSLCERTTYPE,"PEM");
        curl_easy_setopt(curl, CURLOPT_SSLCERT, "C:\\test\\omg.aps.net.pem"); 

        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE); 
        curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2);   
        curl_easy_setopt(curl,CURLOPT_KEYPASSWD,"");


        //curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
        //CA("JL1l");
        //curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &config);
        //CA("JL1m");
        //curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); 
        //CA("JL1n");

        char error[1024];
        curl_easy_setopt ( curl, CURLOPT_ERRORBUFFER, error ); 


     /* send all data to this function  */ 
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &AppWriteMemoryCallback);

    /* we pass our 'chunk' struct to the callback function */ 
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk1);

    /* some servers don't like requests that are made without a user-agent
     field, so we provide one */
        //curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");   

        //curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
        //curl_easy_setopt(curl, CURLOPT_HTTPGET,1);

//heres the performance get down its around 40 seconds to call the server 

        res = curl_easy_perform(curl);
//  
        if(CURLE_OK != res)
        {

            errorCode = kFalse;

            if(chunk1.memory)
              {

                free(chunk1.memory);
              }
             curl_easy_cleanup(curl);
          return errorCode;
        }
        errorCode = kTrue;

        if(chunk1.memory)
        {

            returndata.SetCString(chunk1.memory);
            free(chunk1.memory);

        }


      /* always cleanup */
    curl_easy_cleanup(curl);curl_global_init(CURL_GLOBAL_ALL);