In the one example I was looking at, ~550,000 UVs were written out (without compression) instead of ~125,000 (with compression) - the resulting output. obj file size (basically, a UV vertex is exported for every point of every polygon). this option will let you disable compression, which will greatly speed up exporting, but also greatly increase the resulting.
New Feature: UV and Normal compression/optimization is now an user export option - compression is still enabled by default, but it was brought to my attention that certain plugins (tree/shrub-generation, for example) generate UVs that caused my compression code to take an extremely lengthy time to process (on huge files).This update was primarily an internal code re-structuring update, but also includes several bug fixes and a few new features. Riptide Pro v2.2 Update is now available in the downloads section of my site. Riptide Pro - v2.2 Update By PropShop Admin on Friday 11 March 2011 - 19:42:34