On Mon, 2014-04-21 at 20:09 -0300, Alejandro J. Cura wrote: > When using the Apps scope, there's a noticeable delay when loading > icons of search results and screenshots of previews.
Is the dash re-using the same session to download all the icons? My network connection is very fast, but it's still a little slow to download these icons, even on my workstation connected via ethernet to the network. A very large part of the time is spent, purely in the connection phase of talking to the server. So I'm seeing two things we could do, independent of image size, and without even implementing local caching to disk, that would provide a very useful performance improvement. 1) Re-use of the connection session to avoid DoSing the server with lots of requests, and to minimize time in "connecting" phase of the transaction. 2) Optimize SSL/TLS handshake performance on the server. As all these requests are happening over HTTPS, the handshake can slow things down, especially when we're spamming the server with so many independent connection requests. I'm seeing in my browser that after about 5 connections, the period spent in "connecting" to the server (prior to any actual content transfer of the icon), seems to continually get larger with each additional request. So it seems like maybe 3 threads in the dash, each with their own connection to the server, might be optimal, along with any optimization we can do on the server, to make the HTTPS transaction as fast as possible. -- Mailing list: https://launchpad.net/~ubuntu-appstore-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-appstore-developers More help : https://help.launchpad.net/ListHelp
