Time to first byte over 40 seconds on only one page

Question

First thank you for all the members of this great community. I have some awkward problem. This page http://www.tophebergeur.com/hebergement/perl/ has TTFB of more than 40 seconds.

These are the info from http://www.webpagetest.org/result/150625_AS_188H/1/details/

Error/Status Code: 200
Client Port: 2034
Request Start: 0.426 s
DNS Lookup: 367 ms
Initial Connection: 59 ms
Time to First Byte: 34765 ms
Content Download: 21 ms
Bytes In (downloaded): 14.2 KB
Bytes Out (uploaded): 0.4 KB

But when I filter this list by country the problem of TTFB is gone /hebergement/perl/canada/

I was looking in the server logs but couldn't find where is the problem

Thanks in advance

Answer 1

The problem has been solved. Apparently it was a problem of Cache. I'M using CDN that failed to load the cache of this page. THank you all. And I apprecited your help :)