Google recently unveiled a secret project codenamed "Caffeine" that will change the infrastructure of its existing search engine.
The Google Webmaster Central blog has this description of Google Caffeine:
For the last several months, a large team of Googlers has been working on a secret project: a next-generation architecture for Google's web search. It's the first step in a process that will let us push the envelope on size, indexing speed, accuracy, comprehensiveness and other dimensions. The new infrastructure sits "under the hood" of Google's search engine, which means that most users won't notice a difference in search results. But web developers and power searchers might notice a few differences, so we're opening up a web developer preview to collect feedback.So, if you want to accept the invitation and try the "future" Google search engine, access it via this link. Do your own test and post your observation here through comments.
Driven by curiousity, we conducted a speed test for Google Caffeine. Because most blogs say that the new system offers no changes in the user interface, we concentrated on the speed test.
The result was awesome. Google Caffeine is fifty percent (50%) faster than the existing search engine.
The following images show the difference at how fast the keyword "coolbuster" returned results. Not to mention the much larger gap in the indexed pages count.
I think there's a lot more to look forward to. We will keep you posted on this as information becomes available.