Hello, I'm adding my report to the memory usage category.
I had a standard - well produced ePub: 82 html files, largest is 42kb, epub size is 861kb.
When I open Sigil it uses about 150kb of memory. After editing for about an hour - F&R (no saved searches), and closing extra tabs after I open more than 5-6, I noticed Sigil was slowing down...it would take a little longer to highlight text when I double-clicked, and it would be slow to highlight when I drug the mouse. The memory usage was over 1.2GB.
I saved, closed Sigil, then reopened the same epub. Memory usage was back to 150kb.
Again after another hour of fairly light editing the memory usage was over 2.5GB and staying there. It fluctuates very slightly when I close a tab or save.
I just did a F&R that had 38 matches...I stepped through individually using the Replace/Find button and it went from 2.5GB to 3.3GB...sat there for about 2 minutes after I was done, then dropped down to 2.7GB.
I had a clean install of Sigil 64...sorry haven't tried 32bit yet.
I have no idea if that helps at all...
Windows10, version 1809, 64, i7-7700@3.6GHz, 16GB RAM
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