Google set to update search with 'Caffeine'

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Google has been secretly tweaking its search engine's underlying infrastructure.

The search giant said today it has been working on updating the architecture of its search system for the past few months, in a project dubbed "Caffeine".

"It's the first step in a process that will let us push the envelope on size, indexing speed, accuracy, comprehensiveness and other dimensions," Google engineers Sitaram Iyer and Matt Cutts wrote in a blog post.

As the changes all affect "under the hood" infrastructure, web users won't notice much of a difference, the pair said, but web developers and "power searchers" will notice some improvements.

Google is asking developers to check out the preview of the new infrastructure here, and looking for feedback on any differences between the current search and the new version. Click here for more detail on giving feedback on the new Google search.

Click here for the history of search engines.