11-23-2017, 04:55 PM
Update: Since I wrote about Safari 11.0.1 it seems like Safari has slowed down some, or I'm noticing it more. I get brief beachballs of about a second going into Safari (clicking from another application into an open Safari window). And when my email program sends a link it does seem to take a bit longer to get into Safari 11 than with Safari 10.
Once pages start to load they load fast, but it seems like Safari 11 is putting more overhead on the system than Safari 10 did. It's not awful, but it's not ideal either.
I do have several pages and tabs open, which may be part of it. But I've also got plenty of memory (16 GB), with few other applications open. Activity Monitor shows Safari using 1.1 GB memory. When I clicked from Activity Monitor into Safari, Safari's CPU use went from 0.2% to something like 65% for a moment, then dropped to 0.5%-1.5% as I'm typing this (with intermediate stops bouncing around 5-8%).
Now, this is on a 2010 MacBook Pro (2.4 GHz Core2Duo) running Mac OS 10.11.6. A later Mac or later OS version might work better with Safari 11. (Also have a Samsung EVO 850 1 TB SSD, but I don't think that's relevant.)
The base mid-2011 iMac had a 2.5 GHz quad-core i5, or the base late-2011 had a 2.7 GHz Core i5, either of which is a lot faster than my MBP.
Once pages start to load they load fast, but it seems like Safari 11 is putting more overhead on the system than Safari 10 did. It's not awful, but it's not ideal either.
I do have several pages and tabs open, which may be part of it. But I've also got plenty of memory (16 GB), with few other applications open. Activity Monitor shows Safari using 1.1 GB memory. When I clicked from Activity Monitor into Safari, Safari's CPU use went from 0.2% to something like 65% for a moment, then dropped to 0.5%-1.5% as I'm typing this (with intermediate stops bouncing around 5-8%).
Now, this is on a 2010 MacBook Pro (2.4 GHz Core2Duo) running Mac OS 10.11.6. A later Mac or later OS version might work better with Safari 11. (Also have a Samsung EVO 850 1 TB SSD, but I don't think that's relevant.)
The base mid-2011 iMac had a 2.5 GHz quad-core i5, or the base late-2011 had a 2.7 GHz Core i5, either of which is a lot faster than my MBP.