Filters refusee to render

I dont know if its because Im running ff off a thumb drive using parallels or not but ocassionaly of late I will make a filter that in editor view renders fast but when i close the editor the preview window either never renders it or takes 5-10 minutes ???? any Ideas what could be causing this?

Thanks for any help if you need additional info please let me know beyond toilet flush several of the ones I submitted yester day respond similarly

Today I was putting the final polish on my matrix code filter and it refuses to render it --no errors just nothing yet in editor view the result renders fine

I even waited 45min to see if it was just being sluggins but it isnt that

okay this is weird I deleted the resume file and rebooted the vm and it works now but it waits 3-5 min before it starts rendering and then it zips right through it --looks like its a vm related error instead of ff

and by the way to the filter maker on this one, 30 of those 5 color gradients can be removed and not lose a single function or effect in the filter.

ah, it was your filter. lol. ok. i removed those 30, 5 color grads. it's still super slow