Build 5.0.0.8 of xlsgen is a performance fix pack, and also contains a fix for cell metadata :

- better handling of XLSX files with many internal relationships (hyperlinks) to avoid GPF case.

- removed most middle layer API calls to traverse relationships, avoiding bottleneck in files with many internal relationships

- refactored code in tables and pivot tables that were indirect bottlenecks as well


Also a fix for cell metadata to better return hit test for cells containing hyperlinks.