Long respond time from CUBE API to Epay

\n
             timelookup:  %{time_namelookup}\n
               time_connect:  %{time_connect}\n
            time_appconnect:  %{time_appconnect}\n
           time_pretransfer:  %{time_pretransfer}\n
              time_redirect:  %{time_redirect}\n
         time_starttransfer:  %{time_starttransfer}\n
                            ----------\n
                 time_total:  %{time_total}\n
\n

curl "http://cnprfront.epay-net.org/easypay-server-mvc/api/payments?clientName=CUBECN&orderAmount=0.0&channelType=WEB&oneClick=-1&privateCustomer=-1&professionalCustomer=-1&forLoyaltyCustomer=-1&forNotLoyaltyCustomer=-1?ularDelivery=-1&paymentOnDelivery=-1" -H "Pragma: no-cache" -H "Accept-Encoding: gzip, deflate, sdch" -H "Accept-Language: fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4" -H "Upgrade-Insecure-Requests: 1" -H "User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1" -H "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8" -H "Cache-Control: no-cache" -H "Cookie: JSESSIONID=89ED8D62D30A1CEA8BCEED04E8B074AF.frt004" -H "Connection: keep-alive" --compressed -IL -w "@curl_display.txt"
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fzou@cnpradm01:~$ while true; do curl -s -o /dev/null -w "Connect: %{time_connect} DNS: %{time_namelookup} TTFB: %{time_starttransfer} Total time: %{time_total} Size: %{size_download} \n" -H 'Host: cnprfront.epay-net.org'http://cnprfront.epay-net.org;done                            
Connect: 0.008 DNS: 0.006 TTFB: 0.011 Total time: 0.011 Size: 426
Connect: 0.002 DNS: 0.002 TTFB: 0.004 Total time: 0.004 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.008 Total time: 0.008 Size: 426
Connect: 5.005 DNS: 5.005 TTFB: 5.010 Total time: 5.010 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.006 Total time: 0.006 Size: 426
Connect: 0.002 DNS: 0.002 TTFB: 0.004 Total time: 0.004 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.008 Total time: 0.008 Size: 426
Connect: 5.005 DNS: 5.005 TTFB: 5.010 Total time: 5.010 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.006 Total time: 0.006 Size: 426
Connect: 0.002 DNS: 0.002 TTFB: 0.004 Total time: 0.004 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.008 Total time: 0.008 Size: 426
Connect: 5.005 DNS: 5.005 TTFB: 5.009 Total time: 5.009 Size: 426
Connect: 0.004 DNS: 0.002 TTFB: 0.006 Total time: 0.006 Size: 426
Connect: 0.002 DNS: 0.002 TTFB: 0.004 Total time: 0.004 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.008 Total time: 0.008 Size: 426
Connect: 5.005 DNS: 5.005 TTFB: 5.009 Total time: 5.009 Size: 426
Connect: 0.004 DNS: 0.002 TTFB: 0.007 Total time: 0.007 Size: 426
Connect: 0.002 DNS: 0.002 TTFB: 0.004 Total time: 0.004 Size: 426
Connect: 0.003 DNS: 0.002 TTFB: 0.008 Total time: 0.008 Size: 426
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