[MlMt] huge jumps in RAM use - anyone?

[Tim Lance]

I am still testing MailMate and so far have but one thing bothering me. 
At least once a day I see in ActivityMonitor huge jumps in all columns 
for memory use - like by a factor of 3 or 4. For example, for the Memory 
column instead of the usual 200-300 MB I’ll see anything from 600-800 
to well over 1 GB, in that column alone. It never goes back down, even 
after purging. After a MailMate restart things are back to normal.

Anyone else? I’ve never seen another client do such.

Thanks for any information/ideas.

Tim

macOS 10.12.6
2.9 GHz i7
16 GB RAM