For a long time, each new generation of chips increases single thread clock for clock performance by about 20%.
It appears that Haswell CPU might be way different. I read that it would have a
"Massive increase in clock for clock single threading performance compare to Sandy Bridge(2.5x) and Ivy Bridge(1.9x)." on wikipedia. Here is the interesting part. I went back to look at this again.... and it was gone!
I went looking a little more and found it several other places, but then again it was quickly scrubbed.
See:
http://www.answers.com/topic/haswell-microarchitecturecompared to google cache:
http://webcache.googleusercontent.com/s ... ridge(2.5x)+and+Ivy+Bridge(1.9x).&cd=2&hl=en&ct=clnk&gl=us&source=www.google.com
http://www.facebook.com/pages/Intel-Has ... 2382375337compared to google cache:
http://webcache.googleusercontent.com/s ... ridge(2.5x)+and+Ivy+Bridge(1.9x).&cd=1&hl=en&ct=clnk&gl=us&source=www.google.com
(webcache.googleusercontent.com/search?q=cache:-yOJXwYWRtkJ:www.facebook.com/pages/Intel-Haswell/143082382375337+%22clock+for+clock%22+Sandy+Bridge(2.5x)+and+Ivy+Bridge(1.9x).&cd=1&hl=en&ct=clnk&gl=us&source=www.google.com)
Even the caches are getting scrubbed:
on the following search on google about noon on May 3, 2011
"clock for clock" Sandy Bridge(2.5x) and Ivy Bridge(1.9x).
I got the following three results:
Intel Haswell | Facebook - 11:48amMassive increase in
clock for clock single threading performance compare to
Sandy Bridge(2.5x) and
Ivy Bridge(1.9x). 160/128-bit QPI 3.0 datapath support. ...
www.facebook.com/pages/Intel-Haswell/143082382375337 - CachedHaswell: Information from Answers.comMassive increase in
clock for clock single threading performance compare to
Sandy Bridge(2.5x) and
Ivy Bridge(1.9x). 160/128-bit QPI 3.0 datapath support. ...
www.answers.com › Library › Travel & Places - CachedHaswell (microarchitecture) - Ask Jeeves Encyclopedia Apr 28, 2011 ... Massive increase in
clock for clock single threading performance compare to
Sandy Bridge(2.5x) and
Ivy Bridge(1.9x). ...
uk.ask.com/wiki/Haswell_(microarchitecture) - United Kingdom - CachedWhen I went to look at the cache for uk.ask.com it has been scrubbed. The thumbnail information displayed in the google search results was no longer on the page or even in the cache page????
Compare:
http://uk.ask.com/wiki/Haswell_(microarchitecture)
with
http://webcache.googleusercontent.com/s ... chitecture)+%22clock+for+clock%22+Sandy+Bridge(2.5x)+and+Ivy+Bridge(1.9x).&cd=3&hl=en&ct=clnk&gl=us&source=www.google.com
(webcache.googleusercontent.com/search?q=cache:qr1rpwaSz-QJ:uk.ask.com/wiki/Haswell_(microarchitecture)+%22clock+for+clock%22+Sandy+Bridge(2.5x)+and+Ivy+Bridge(1.9x).&cd=3&hl=en&ct=clnk&gl=us&source=www.google.com)
Here both the page and the cache have been cleaned of information that showed up in the google search thumbnail.
Does anyone have an explanation about what they heck is going on? Maybe however is going around scrubbing this information will find this post and explain what the heck is going on... and why they are going to such great effort to scour this correct (or incorrect) information from the internet.
Why care? Haswell isn't that far away. Ivy Bridge is due around the end of 2011 and Haswell is due around the end of 2012. If there is going to be that big a jump in performance at the end of 2012, I might delay some of my purchasing decisions. No strike that. I will delay some of my purchasing decisions.