My website has seen ever decreasing traffic, so I've been working to increase speed and usability. On WebPageTest.org I've worked most of my grades up but First Byte is still horrible.
First Byte Time (back-end processing): 0/100
1081 ms First Byte Time 90 ms Target First Byte Time
I did a packet capture (SeverSide) and analyzed it using wireshark. during a hit and leave visit to the site I got:
6 lines of BAD TCP happening at about lines 28-33 warning that I have TCP Retransmission and TCP Dup ACK... 2 of each of these warnings 3 times.
Under the expanded panel viewing a Retransmission/ TCP analysis flags - "retransmission suspected" "security level NOTE" RTO of 1.19 seconds.
Under the expanded panel viewing DCP Dup ACK/ TCP analysis flags - Duplicate ACK" "security level NOTE" RTT of 0.09 seconds.
I don't know if this is wise to do or not, but I've uploaded my packet capture dump file.
example captures of flagged tcp.
asked 21 Oct ‘13, 14:39
edited 21 Oct ‘13, 15:20
I've accessed your page several times and I don't get any TCP retransmissions. The rating on WebPageTest.org is also pretty good, only the
I don't think this is related to network problems and/or the technical structure of the page, as there is no real problem.
The overall rating of http://www.microsoft.com is much worse than your page (in several categories) and I guess they don't have any problem with decreasing traffic.
So, there must be another reason and I see the following possible reasons for a decreasing number of visitors.
answered 21 Oct '13, 17:32
Kurt Knochner ♦
edited 21 Oct '13, 17:35