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System Preferences, Flash, Advanced tab, Delete All, select the first option only.

It might help, not saying that it definitely will. It certainly works for me a lot of the time!
 
Flash sucks. Period.

HTML5 is much better on YouTube.


On the contrary, i recently (last week) had to turn HTML5 video off in you youtube account, because it was making current Safari basically lock up and run like a dog on my 2011 MBP.

Installed most recent flash, used flash, problem went away.



Check to see whether you have HTML5 video enabled in your youtube account. I did and performance had been fine until a recent safari update, and now youtube sucks in Safari with HTML5 video on....
 
For me, HTML5 videos takes "forever" to load and kind of freezes Safari, a problem I have never experienced with Flash. Except for draining the battery really fast, I actually prefer Flash over HTML5.

Base early 2011 13" MBP with 8 GB RAM running Lion (but it's the same on all three DP's of Mountain Lion as well).
 
What is the average CPU load whilst playing a youtube video (flash and HTML5) on OSX?
That would be very difficult to determine, with variables such as which hardware configuration is used, which OS version, what other processes are running, what version of Flash, what specific Flash content is being played, etc.
 
That would be very difficult to determine, with variables such as which hardware configuration is used, which OS version, what other processes are running, what version of Flash, what specific Flash content is being played, etc.

True say, I would be presuming various people would reply with specifics of their machnie so I could get a jist of the performance. Say for example, on a modern mac, running OSX 10.7, with the modern 'Sandy Bridge' i7 processor, viewing a 720p video. How would that fair?
 
True say, I would be presuming various people would reply with specifics of their machnie so I could get a jist of the performance. Say for example, on a modern mac, running OSX 10.7, with the modern 'Sandy Bridge' i7 processor. How would that fair?
Again, it would depend on what other apps/processes are running, what version of Flash they're running and the specific Flash content being played. It would be more meaningful to simply test it yourself, on your own computer, choosing whatever Flash content your normally play.
 
Again, it would depend on what other apps/processes are running, what version of Flash they're running and the specific Flash content being played. It would be more meaningful to simply test it yourself, on your own computer, choosing whatever Flash content your normally play.

Okay then I'll be more specific for everyone. How much processing power would viewing a 720p video on YouTube, on OSX 10.7, running a modern version of the Flash Player on a 2011 Macbook Pro with either a quad-core i7 processor and a 6750M AMD GPU or a dual-core i5 processor and an HD3000 IGP (running no other task than Safari and the flash plugin), take up?

I'm asking this question as I have no Macbook of my own to test this on.
 
I haven't been able to use Safari at all for around a week now because flash has been sucking so hard. Swapped to Chrome, but i hate it on OS X, waiting to get a flash update!
 
True say, I would be presuming various people would reply with specifics of their machnie so I could get a jist of the performance. Say for example, on a modern mac, running OSX 10.7, with the modern 'Sandy Bridge' i7 processor, viewing a 720p video. How would that fair?

Again, it would depend on what other apps/processes are running, what version of Flash they're running and the specific Flash content being played. It would be more meaningful to simply test it yourself, on your own computer, choosing whatever Flash content your normally play.

keeping in mind what GGJ said, i find my CPU load to be barely above idle with 720p videos. 17" early 2011 with a sandy bridge i7 at 2.2GHz, this was with the integrated HD3000 GPU forced.
 
Okay then I'll be more specific for everyone. How much processing power would viewing a 720p video on YouTube, on OSX 10.7, running a modern version of the Flash Player on a 2011 Macbook Pro with either a quad-core i7 processor and a 6750M AMD GPU or a dual-core i5 processor and an HD3000 IGP (running no other task than Safari and the flash plugin), take up?

I'm asking this question as I have no Macbook of my own to test this on.

1.21 Gigawatts
 
I have a serious problem. My MBP 13'' 2011 4GB RAM usually runs fine…EXCEPT when watching youtube videos. Safari just freezes constantly, and it is extremely annoying. What can I do to improve performance?


Flash is way too inefficient, and I know now why people criticize it so hard. :p

I have the same one and it works great...
 
I've had some YT problems aswell in the html5 trial. Turned it off and all seems to be going pretty smooth so far
 
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