Oh, right. OpenLayers (the library that handles the map image)
automatically buffers non-tiled images by a certain amount to give
some 'continuity' when panning. By default, the ratio applied is 1.5
I think, so it requests an image 1.5 x wider and higher.
We need to add an option to the Map tag in the ApplicationDefinition
to allow adjusting the ratio used by OpenLayers. I've filed an
enhancement bug in trac for this (http://trac.osgeo.org/mapguide/ticket/327
).
Cheers
Paul
On 22-Nov-07, at 9:07 AM, Bruno Scott wrote:
here is my test today with GG and AGG
mg2.0+AGG-fusion 17 sec
mg2.0+AGG+fusion 30 sec
mg2.0+GD-fusion 10 sec
mg2.0+GD+fusion 20 sec
GD seems faster than AGG
A little precision, i have a huge screen resolution 1900x1200
I did my test full screen
I have also noticed something, the image generated by fusion is a
lot larger
than the one without fusion.
We see it when we pan, the image is about 20% bigger than what we
see on the
screen.
20% bigger in 4 direction make the image about twice big.
And with a resolution of 1900x1200 this could explain the gap in
performance
with or without fusion.
Bruno
Bruce Dechant wrote:
The performance difference can be attributed to the fact that this
is a
Beta version being compared to a Release version.
Some things to consider:
- 1.2 used the GD renderer, whereas, 2.0 is using the new AGG
renderer
(looks much better)
- there are several places in the code that have not been optimized
yet
(algorithms, memory usage, thread usage, etc...)
- Fusion is a brand new feature of the 2.0 release and has not been
optimized either
- this is a Beta and doesn't necessarily reflect the final release
code.
:)
Thanks,
Bruce
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul
Spencer
Sent: November 21, 2007 10:04 AM
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Mapguide 2.0 Beta1 vs 1.2 performance
It uses the mapdefinition that is set in the application definition,
if its a tiled map then it should be tiled in the client, otherwise
it
should be a regular old map draw.
Has anyone else got feedback on this? I saw fusion running on a
laptop yesterday, not tiled, full screen, and it was milliseconds
(<500ms) to pan/zoom (didn't look at select).
Paul
On 21-Nov-07, at 3:22 AM, Zac Spitzer wrote:
sounds like fusion ain't hitting the tile cache???
On Nov 21, 2007 6:44 PM, Bruno Scott <[EMAIL PROTECTED]> wrote:
I have 2 identical vm-ware with windows 2003 running on the same
machine
I start one of the vm-ware, I do the testing, I stop it and then
start the
other to do the other bench Bench is done on the sheboygan sample
at 1:5000
scale
MG 2.0 with fusion Mg 2.0 without
fusion Mg 1.2
pan 29 sec 12 sec 2
sec
select 28 sec 12 sec 2
sec
I know it's only a beta but why is that slow?
Bruno Scott
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Zac Spitzer
http://zacster.blogspot.com/
+61 405 847 168 (aussie moible)
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