[rabbitmq-discuss] Experimental RabbitMQ Topology Visualiser

Sat Jul 9 19:55:33 BST 2011

Hi Matthew,

Have you seen/tried this to do something similar to what you try to achieve with js: 

Demo: http://tweetplumb.com/?q=#%23jquery

Library home page: http://jsplumb.org/jquery/demo.html

Cheers,

Alvaro

On Jul 5, 2011, at 2:49 PM, Matthew Sackman wrote:

> On Tue, Jul 05, 2011 at 05:42:08AM -0700, Joseph Marlin wrote:
>> Speaking of CPU usage, I'm getting a *lot* of it when I have the tab with 
>> this visualizer visible in Chrome on Ubuntu: http://i.imgur.com/uhU2m.png
> 
> Yup. n-body simulations are CPU intensive, especially when you're
> crippled by a language like javascript. That said, firstly, since the
> release at the end of last week, I've done further optimisations such as
> frustum culling, and secondly, profiling in chrome (it's built-in
> profiler is very very good!) shows that actually the CPU cost is not in
> the physics, but in the canvas drawing operations - the general state of
> canvas implementations seems to be fairly unoptimised, especially when
> it comes to things like drawing text. This could be because most of the
> shiny shiny demos don't spent a lot of time drawing text or doing much
> other than moving balls attractively around a screen ;)
> 
>> Is that normal? The dip in the beginning was when I switched to a different 
>> tab for a few seconds.
> 
> Alas so. I'm doing what I can to minimise this, but it's been fairly
> well demonstrated that implementing something in flash still leads to
> better performance than an HTML canvas on modern browsers - they still
> have some way to go yet to close the performance gap.
> 
> Matthew
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