While waiting for emerge --sync to finish, I got curious about the number of patches distributed in the portage tree itself. In the portage tree there are ~8300 patches inside 'files' dirs (*.patch). They sum up to ~15 MiB (du -b) or ~38 MiB (du -c), it depends on your filesystem. This means that 7% of the files in portage are patches and between 5% and 7% of the size of the portage tree is due to patches. Anyway, I am not suggesting you to remove patches from the various 'files' dirs, I just wonder if you know that the number of patches in portage is that big.
*** This bug has been marked as a duplicate of 123634 ***