Hi,
Thanks for your inquiry. This is Amber from E-iceblue support team.
Please note that license is only used to remove warning information and has nothing to do with the time of PDF generation.
Now the latest version is
Spire.XLS Pack Version:9.7 which has more improvements than the old one. Since the fixes and new features are always included in latest version, I suggest you try to use the latest one firstly.
If the latest version couldn’t solve your issue, please offer us following information for further investigation.
1. Your input Excel file.
2. The total time of your generating.
3. Your complete code.
4. The OS and Region information, e.g. Win7 64bit, China/Chinese.
5. The RAM information, such as 8GB.
Best wishes,
Amber
E-iceblue support team