[aida] HTTP optimizations: streaming everything, gzip compression

Germán Arduino garduino at gmail.com
Mon Feb 11 21:22:48 CET 2013

Hi Janko:

Very interesting news, I will try to find some time to check all the info.

Please, let me know the changes in Swazoo/Aida, to be able of maintain
the Cuis ports.

Germán Arduino

2013/2/5 Janko Mivšek <janko.mivsek at eranova.si>:
> Dear Aiders,
> While watching an excellent presentation by Ilya Grigorik from Google
> Web Fast Team:
>         Faster Websites, Crash Course on Frontent Performance
>         part1: http://parleys.com/#st=5&id=3648&sl=0
>         part2: http://parleys.com/#st=5&id=3649&sl=1
> I come to idea to implement few optimizations Ilya mentioned in his talk:
> 1. web page is now streamed to the browser to start sending as soon as
>    possible so that browser can start fetching CSS and JS files listed
>    in page header in parallel. Until now a whole page was first
>    rendered before start sending.
> 2. gzip compression of page HTML and all other text resources like CSS
>    and JavaScript. This reduces the load time substantially, usually
>    about 5 times.
> End result is more than twice faster page load time, both time until
> page starts rendering on browser and overall load time. We are now below
> 250ms to the first byte time, which is nowadays a goal to regard your
> site as a fast one. Note that this includes a DNS lookup time
> (50-150ms), connection time (50-100ms) then content download.
> Another achievements are 4 A on http://www.webpagetest.org:
>         A First Byte Time
>         A Keep-alive Enabled
>         A Compress Transfer
>         A Compress Images
>         F Cache static
>         X Content Delivery Network detected
> This F cache static is such because we instruct browsers to cache images
> only 24 hours. For a reason to more easy upgrade web apps without
> needing instruct the users to reload pages. They just wait one day...
> X Content Delivery Network, well, I'm not sure we would profit much to
> use it except add another level of complexity ...
> Google regards such optimizations in this pageRank algorithm, which is
> one of the reasons to be worthwhile.
> All those optimizations will be part of next Aida (and Swazoo) release,
> it will also be soon on production server for http://www.aidaweb.si, so
> that you can try by yourself :)
> Best regards
> Janko
> --
> Janko Mivšek
> Aida/Web
> Smalltalk Web Application Server
> http://www.aidaweb.si
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