Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Using it myself, runs very nice, have reported a few crashes to Apple though, seems to have some issues downloading from various websites.
 
To me the speeds of both Safari 3 and Safari 4(beta) feel exactly the same. Maybe Safari 4 is a bit snappier, but not significantly noticeable. The only concern is that Safari 4 takes up 200MB+ after being on for about 20 minutes.

Memory leak not fixed I suppose? I hope they fix it by its final release.
 
To me the speeds of both Safari 3 and Safari 4(beta) feel exactly the same. Maybe Safari 4 is a bit snappier, but not significantly noticeable. The only concern is that Safari 4 takes up 200MB+ after being on for about 20 minutes.

With 4GB of RAM, what's 200MB? It's a LOT less than I experienced with Firefox! With FF, I'd have to shut it down and restart it frequently, to force it to release resources. I can run Safari all day, with dozens of tabs open, and never have to restart it. It launches and opens pages significantly faster on my MBP. I do miss the add-ons and some features of FF, but as far as speed, Safari blows it away! I haven't noticed a measurable difference with Safari 4 yet, but both are extremely fast.
 


Apple has started seeding developers with an early version of Safari 4 (5526.11.2). The releases comes amidst news of Apple's plans for Mac OS X 10.6 (Snow Leopard) which will focus on performance and quality.

In their press release for Snow Leopard, Apple revealed that Snow Leopard includes Safari "with the fastest implementation of JavaScript ever, increasing performance by 53 percent, making Web 2.0 applications feel more responsive." Apple will reportedly accomplish this dramatic speedup with SquirrelFish technology which is currently under development for Webkit. Snow Leopard is due for release in "about a year", though Safari 4 release could come much sooner and for existing operating systems. In fact, they are seeding versions specifically for Windows, Tiger and Leopard.

Apple's focus on high performance Javascript becomes obvious now that they have demoed the new web applications that come with MobileMe (Guided Tour). MobileMe provides web-applications for email, calendar and address book which were described as being as responsive as desktop-based applications.

Article Link

I am happy to hear this news.
But I don't download it.
Because now my os is 10.4, yesterday I updated to 10. 4. 11,
the result was that the os was destroied and even couldn't enter the os.
But I still love Apple,
because when I sit in front of an apple computer,
I at once feel that computer is art,
however,
when I sit in front of a pc which's os is window,
I clearly feel that it is an only machine.
 
Try that under 10.6 and see what happens.

I'm just sayin.:)

I've passed the Acid3 test on Safari 4 for Tiger and Windows. Curiously, on Leopard I've got stuck in either 97 or 98, with it stopping after loading "15 of 22 items".

Weirdly, that was this morning. I've just repeated the test and Leopard got 100/100.

Leopard is very weird.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.