Perfomance issue related with multiple complex Excel formulas

When exporting an Excel template (XLSX) with a high amount of complex formulas and issues in bulk the Xporter engine seems to be hanging at around 64% for a while. However, after an unreasonable amount of time (that depends on the number of cells to be processed) the template export will succeed without any noticeable issues, apart from the performance hit that is being described.

Steps to reproduce:

1. Have a template with multiple and complex formulas
2. Bulk export the template with a reasonable amount of issues using the same template

Actual result: Template export will hang at around 64% for a good amount of time. The template will still be exported if given enough time.

Expected result: The template export proceeds smoothly without hanging for an unreasonable amount of time.