Safari 4 Beta

I installed the Safari 4 beta on my macbook last night, I HATE it. On Safari 3 I have around 600 tabs open, these hover at around 750 MB RAM usage, and around 5 - 7 % CPU usage depending on what tabs are in focus (idle state i.e.). Yup, Safari 3 really does a good job of not wasting processor cycles on tabs in the background. Safari 4 comes along and destroys everything. The CPU usage is 97 - 120 % average and the memory usage is through the roof. This was despite the fact that I told it not to make a snapshot cache of my bookmarks. I gave it about 3 hours to settle down (indexing et. al), and then even a couple of restarts but the high CPU usage remains. 

Verdict: unusable for me at the moment. Safari 3 it is.