Thanks Lars. I will wait for new update in Emacs source code, then re-compile Emacs. [stardiviner] GPG key ID: 47C32433 IRC(freeenode): stardiviner Twitter: @numbchild Key fingerprint = 9BAA 92BC CDDD B9EF 3B36 CB99 B8C4 B8E5 47C3 2433 Blog: http://stardiviner.github.io/ On Sat, Aug 22, 2020 at 9:03 PM Lars Ingebrigtsen wrote: > "numbchild@gmail.com" writes: > > > The commit "e1f09607e0" caused this problem. I confirmed by git > > checkout a commit before it. And re-eval source code, then the problem > > is gone. This is because the commit added > > ~image-converter-file-name-extensions~ in image-convert.el library > > which includes "pdf" file extension. It uses command "gs" to convert > > pdf to image which use 100% of CPU. > > I think image-converter.el should have a list of types that it shouldn't > attempt to convert, even if the backend says that it can. PDF/PS are > obvious things -- they aren't images, but imagemagick will offer to > display them anyway. > > I'll add that to Emacs 28. > > -- > (domestic pets only, the antidote for overdose, milk.) > bloggy blog: http://lars.ingebrigtsen.no >