I'm not sure if this is technically a GS bug, but we have some files that render with massive temp file and memory usage. Attached is an example. gsc -dBATCH -dNOPAUSE -dUseCropBox -sDEVICE=tiffsep -sOutputFile=/tmp/18108-buildtiffs -r300 -f 20196MOT201.pdf
Created attachment 10015 [details] file that demonstrates bug
The file has a very large page size (~19x6 inches), its 'mostly' composed of images (850 of then) in an unreasonably large number of colour spaces (749). Although it has ExtGStates containing CA and Blend, these don't appear to actually have any transparent content. There are also a number of shading dictionaries, again in complex colour spaces (NChannel/ICCBased) Assuming that the large temp files are due to the clist, I'm assigning this one to Ray to have a quick look at it. I suspect that there is no actual problem, its just a consequence of the way the file is constructed.
Fixed, not sure how since git bisect first shows it fixed with 6948650efd3fb9e2a70b8cf16aca57e9d0b7eb0a Commit of build_consolidation branch which touches pretty much everything, and was not supposed to introduce any functional differences. Closing as FIXED.