Google search index bigger than Yahoo

Posted on Tuesday, August 16 2005 @ 10:50 CEST by Thomas De Maesschalck
Yahoo proudly announced last week their search engine index is now twice as big as Google's, but is that really true? Google investigated it and claimed they couldn't find any evidence Yahoo's claim is true.

So some guys decided to create a PERL script which generated 10,012 different searches at Google and Yahoo with randomly selected keywords from an English worldlist. The test took them 18 hours and based on their results they conclude Google's index is actually on average 166.9 percent bigger than Yahoo's index.
In fact, in the 10,012 test cases we ran, only in 3% of the cases (307) did Yahoo! return more results. In 96.6% of the cases (9676) Google returned more results. In less than 1% of the cases (29) both search engines returned the same number of results.
Seems like there is something fishy with Yahoo's claim of having 19.2 billion documents in their index while Google only has 8.2 billion. Read on over here for the full report.

UPDATE (July 20th, 2011): Link dead, data now available at Aprendelo.

About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.

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