Comment 2 for bug 47842

I've experienced this too. I selected a little over 10000 files in my /tmp directory, and hit the Delete key. Nautilus is has been using 100% CPU for many minutes already, and has also started swapping as it apparently tried to use nearly 600MB of memory.

In my case the files were "testbzrXXXXXXX.log" files, mostly empty ones, that have no thumbnails when viewed with nautilus, just a standard icon. I was in "View as List" mode.