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[mkgmap-dev] [Patch] Faster BoundaryGrid

From GerdP gpetermann_muenchen at hotmail.com on Wed May 2 11:49:59 BST 2012

Hi WanMil,

attached is a small patch which drastically improves BoundaryGrid for 
tiles that contain mostly sea. I found such a tile in south-america, and the
patched version is > 10 times faster. 
It contais a large part of the pacific, and BoudaryGrid searches the
boundary zip file for 
> 5000 different *.bnd files, most of them do not exist in your
> bounds_20120401.zip , so the 
code in BoundaryUtil searches through all elements of the zip file to find
out that it doesn't exist.

The patch creates a HashSet first with the  available files and calls the
load routine only for 
those that exist.


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