This is my story.
I have recently begin to test AP. So, my initial file was OLYMPUS ORF RAW size 16.8 Mb. I made few corrections with using masks, filters etc. Saved the file and got 588 Mb. Ohhhh!
I went back, deleted all the layers but the single one, saved again. Still 588 Mb. Ok, I am opening again, clicking the layer and choosing [Rasterize...] from drop down menu and.... Oh! Now it is 656 Mb!!! Just can't believe it!
Exported as TIFF 16bit and got quite reasonable 36.1 Mb.
This is not good. Not good at all: [File open] - [Document flatten] - [Save] ...- ... 724 Mb!!!!
I am a bit in panic! If I continue to do ANYTHING with the file it will grow like hell!
But wait! I have got 2 snapshots (one made by the system and one by me) in the file! Maybe?!..
Oh, this is not a simple task - you have to go [View] - [Studio] -[Snapshots] and from there you can delete.
Thank you! Thank you! Thank you!
Now it is "only" 68Mb. Flat file with only one raster image inside.
IMHO this is mad - such a nice product with such a crazy "file size" feature.
Le monde n'est pas juste...