Speed up Earth file loading

[devil-darkside]

Is there a way to speed up the loading of an earth file?
I have built the overview for my imagery and then I have generated the vrt with gdal for both imagery and elevation file.
The problem is that even if I tried to optimize my data the earth file took a lot of time for loading.
Any suggestions?

[gwaldron]

There are several tips on preprocessing and optimizing your data here.

[devil-darkside]

I have already optimized my geotiff by adding overviews (last overview is 128x128 pixel) and generated the spatial index for my shapefiles.
The process is always slow, I have a VRT of 5000 geotiffs at high resolution.

[jasonbeverage]

5000 geotiffs at high resolution can be quite difficult to load using the GDAL driver even if they have overviews. You should consider creating an mbtiles or a TMS dataset out of the data using osgearth_conv (or any other tool) or put your data behind a server that caches tiles so they aren't generated each time.

[devil-darkside]

The startup is quite long with all these file.
I'll try to create several VRT to undestand if I can speed up some processes.
I'm also using the cache option to do not generate each time the tiles and it works fine.
I'll try to generate a tms and/or mbtiles and check performances to see if this could be a possibile solution.