Then again, open source projects like Firefox and Lemmy aren't exactly known for being the best in resource optimization.
Add up the layer of bloatware that's included in Windows and... voliรก! You got yourself an un-optimized mess.
I personally access Lemmy through a low end phone, so i use Jerboa which despite veing pretty "basic" (unlike, you know, Boost), has the advantage of being lightweight and pretty well-optimized.
Except in Kenobi.