I noticed that v3.14 uses CPU slightly more than v2.89.

Notes:
-I did not use any v2 or hybrid torrents while testing v3.14 (the same torrents are loaded for both versions).
-RSS and channels were disabled.
-I ran the 2 versions in similar condition (same settings, same upload speed, no active downloads), but not at the same time.
-I compared CPU usage only while the program is running in the background.