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From Rajani Karuturi <Rajani.Karut...@citrix.com>
Subject Re: UI Latency
Date Fri, 14 Feb 2014 04:59:53 GMT
I agree with John. We should enable gzip compression on tomcat/apache and let it handle.
What we should be doing in the application is minification of CSS/JS and trying to reduce
the number of static files/static get requests..

Thanks,
~Rajani



On 14-Feb-2014, at 2:50 am, John Kinsella <jlk@stratosec.co<mailto:jlk@stratosec.co>>
wrote:

Seems a bit like wheel-reinventing, no? Wouldn’t it be cleaner to get Tomcat’s built-in
compression[1] working? What I don’t see in your code is any ability to negotiate if the
end-client supports gzip compression...

John
1:http://viralpatel.net/blogs/enable-gzip-compression-in-tomcat/

On Feb 13, 2014, at 12:09 PM, Laszlo Hornyak <laszlo.hornyak@gmail.com<mailto:laszlo.hornyak@gmail.com><mailto:laszlo.hornyak@gmail.com>>
wrote:

Ah yes we are playing space-wars, I will fix it as soon as I get there. I
was not that much interested in space/tabs but what it already does:
- at build time it generates .gz files from static resources, like css,
html and js files
- during runtime it checks if there is a gz file for the resource and
silently serves the gz file and sets the headers, only if the client
browser accepts gz of course
- respects Etag since you do not want to download even "just" 500 Kb each
time you hit ctrl-r.

TODO other than the space-war:
- it uses a maven plugin I have built for home use, it is in my maven repo
and it would not be great to give my unreliable repository to everyone, so
it should be either moved to the ACS source or uploaded to the central repo
- Some a would not like to make the build even longer. It is quite short
compared to the full time of the build, but for a CI build it is completely
useless. So it must be moved to a profile and profile should be active
during release process, maybe not anyway unless you manually enable it.




On Thu, Feb 13, 2014 at 7:23 PM, John Kinsella <jlk@stratosec.co<mailto:jlk@stratosec.co><mailto:jlk@stratosec.co>>
wrote:

Looks like Daan had a few issues with the patch for you to resolve
regarding tabs and headers...

On Feb 13, 2014, at 10:14 AM, Laszlo Hornyak <laszlo.hornyak@gmail.com<mailto:laszlo.hornyak@gmail.com><mailto:laszlo.hornyak@gmail.com>
<mailto:laszlo.hornyak@gmail.com>> wrote:

Hi,

I have a patch for the UI compression, it is on review for a while...
But I hope I will be able to resolve the comments in...days.

I measured the download size dropped from 3.5 MB to somewhere around 0.5 MB

https://reviews.apache.org/r/12228/

Adding javascript compression could also help a lot.

That 3.5 M is a lot even on LAN :-)



On Thu, Feb 13, 2014 at 7:04 PM, John Kinsella <jlk@stratosec.co> wrote:

Just posted
http://theresnomon.co/2014/improving-cloudstack-ui-performance/ - open to
any comments.

John

On Feb 10, 2014, at 12:47 AM, Alex Hitchins <alex.hitchins@shapeblue.com
<mailto:alex.hitchins@shapeblue.com>> wrote:

Sounds interesting, I look forward to your write-up.



Regards

Alex Hitchins

D: +44 1892 523 587 | S: +44 20 3603 0540 | M: +44 7788 423 969

alex.hitchins@shapeblue.com<mailto:alex.hitchins@shapeblue.com>

-----Original Message-----
From: John Kinsella [mailto:jlk@stratosec.co]
Sent: 10 February 2014 01:05
To: <dev@cloudstack.apache.org>
Subject: Re: UI Latency

I've been tinkering with httpd proxying the UI via mod_proxy_ajp, then
using mod_deflate to compress on the httpd side. That gets me about a 2.5x
decrease in loading the login screen. system.js, which is the largest item
downloaded by default is around 980k, with gzip that drops to 68k.

I wanna see if I can squeeze a little more performance out by caching the
static stuff...once I get some stats out of that I'll turn it into a blog
post later this week.

John

On Feb 9, 2014, at 3:27 PM, Alex Hitchins <alex.hitchins@shapeblue.com>
wrote:

One of the things that I want to look in to is generating a Gruntfile so
we can 'uglify' and reduce the size of css, js and image sprites. This
should help reduce the initial payload and make a big difference to VPN/low
b/w connections.


Regards

Alex Hitchins

D: +44 1892 523 587 | S: +44 20 3603 0540 | M: +44 7788 423 969

alex.hitchins@shapeblue.com

-----Original Message-----
From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
Sent: 09 February 2014 19:51
To: dev@cloudstack.apache.org
Subject: Re: UI Latency

I could be wrong, but I believe the idea of zipping the content for the UI
start page was discussed, but has not yet been implemented.

As far as I know (and have experienced), every time you go to the start
page, it does seem to take a while to load if you are not over a
particularly fast connection (if I'm in the office, it loads quickly; if
I'm over a VPN connection from, say, home, it tends to be noticeably
slower).


On Sun, Feb 9, 2014 at 8:46 AM, Mo <mo@daoenix.com> wrote:

Hello,

>From my understanding going to the UI at first start-up takes awhile
to load due to the way it is configured, I believe I was previously
told it was gzip for the website. However, I thought this would a one
time thing; it seems to take quite awhile to load UI each time I
visit, unlike versions gone by.

Any advice? Suggestions?

- Maurice




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