Slow performance on WebMap SVG map - why does it take so long (> 10sec) for my SVG map to load on my WebMap Publisher site?
Chances are your SVG (uncompressed) file is too big and contains too much scale inappropriate data.
Here are some recommendations that can help trim down the SVG file size:
(1) Review map content to exclude features that are not scale appropriate.
(2) Thin out (or generalize) scale inappropriate feature into scale appropriate feature for large scale use.
(3) Remove hotspots and tooltips for all features unless specifically required.
(4) Use WebMap's Vector Quality parameter to thin data.
The goal is to keep the svg (uncompressed) file size to around 100Kb.
To give you a better idea, here is breakdown of a 2.8Mb uncompressed SVG that we received from a customer:
To put that in perspective:
Virtually the same map content could easily be delivered in a 20 to 40K SVG.
This pre-made 2.8Mb svg file takes more than 12 seconds for "IE/Adobe SVG Viewer" to load, and remember you need to add the actual map creation time on top of the 12 seconds, plus network traffic etc.
Same principles apply to GWM Flash