Global Mapper v25.0

Possible BUG- GM 20 slow on large vector files

geomannie Global Mapper UserTrusted User
I have just installed GM20 and was looking forward to the "Performance and processing improvements, especially when working with large vector files".

I use OSM XML data and country datasets can be large. For example the Scotland data from decompresses to about 2.8GB. In GM 19 opening is slow at about 9-10minutes but once opened I can zoom and pan relatively freely. In GM 20 the file takes 20-22 minutes to open and once open if I try to zoom or pan, GM 20 freezes, or at least responds so slowly as to be unusable.

Despite the headline improvement in vector rendering, GM 20 is practically useless for these large vector files. Please can you investigate and fix?