Depending on when “in the last few weeks” you saw those reports, it could have been due to this issue that we resolved:
https://discuss.inventables.com/t/resolved-tool-path-generation-slowness/52946/3
Your computer hardware will always play a role in the performance of tool path generation, but we are working on making it as fast as possible for the average computer.
Please share the URL when you have a chance 
Thanks,
Jeff