Hello, do you guys suggest me using Minify Stylesheet option in MyBB?
It says it will lover load time and bandwidth use.
If it's only a good thing, it makes me wonder why it isn't ON by default?
Is there any side-effect?
What about CDN?
Not sure why it's not on by default, but shouldn't have any performance impact. A CDN like Cloudflare would minify it for you too, but probably slightly better. CDN has more of an advantage of being able to serve the files form the best location so would probably end up being the fastest.
So, should I activate both? I also have Cloudflare, that means even if I activate it won't effect anything or it will break Cloudflare?
If you don't have a CDN setup, there''s probably no point enabling that. It's always worthwhile to enable the minify stylesheets option though.
I always minify my css because that way you are saving some space on client side page download.
CDN is recommended but not mandatory, you can always use Cloudfare CDN service though or paid version from MaxCDN.