Data from search engine analysis run on Aug. 4-5, 1999
This chart compares the size of the databases of the Web search engines. For this comparison, I used 25 single keyword and phrase searches that should have been processed identically by each search engine. Since Infoseek and Northern Light automatically recognize word variants and plurals, those terms that could be pluralized were OR'ed together in search engines that do not support automatic plural searching. This and other inconsistencies between the search engines may skew the results slightly.
This comparison is based on the reported number of hits from each database, verified by visiting the last page of results when possible. This is not a measure based on precision, recall, or relevance but only on the raw database size. As such, it provides an important measure of database coverage. For earlier comparisons see below:
While decisions about which Web search engine to use should not be based on size alone, this information is especially important when looking for very specific keywords, phrases, and areas of specialized interest. See also the following statistical analyses:
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