[DiapDealer]

There's never been a question that QtWebKit (and hence Preview/BookView) is going to consume the most resources whenever Sigil is running (that has always been the case on Windows). So it makes sense that only having Code View open will drastically reduce memory usage. We just need to figure out why its (Preview) memory use seems to be running rampant on some--but not seemingly not nearly a majority of all--machines.

It's frustrating to not be able to replicate it on any of the machines I have access to. I regex (a lot), I open lots of tabs (and leave them open), I spellcheck, I split, I merge, I mend, I report, I leave Sigil open for hours and occasionally return to more edits, and STILL I can't get Sigil's memory usage to even approach 1Gb. Not even half that. Even on the machine with an aging video card that I had accidentally applied Windows 7 compatibility properties to Sigil and was experiencing extreme sluggishness and black tooltip windows, I was never ever to get Sigil to even flirt with 500Mb of memory usage.

The machine I use at work is mediocre at best. An under-powered laptop with a video driver that's nearly two years old. And even it runs the latest Sigil like a champ.

So there's a puzzle piece missing. One that I've not given up hope can be discovered and worked around.