Two examples searching for "memory leak" on DE bug trackers: MATE: https://github.com/search?q=org%3Amate-desktop+%22memory+leak%22&type=issues https://github.

Two examples searching for "memory leak" on DE bug trackers: MATE: https://github.com/search?q=org%3Amate-desktop+%22memory+leak%22&type=issues https://github.com/search?q=org%3Amate-desktop+%22memory+lea... (265 results) KDE: https://bugs.kde.org/buglist.cgi?quicksearch=%22memory%20leak%22 https://bugs.kde.org/buglist.cgi?quicksearch=%22memory%20lea... (97 results) That's just for the ones we found. I would be curious to run a full DE through valgrind :) EDIT: Anecdotal datapoint ahead: i just had to kill atril (MATE PDF viewer) on a machine where it was eating 6GB RAM after running for a few days.