I heard on an older podcast that

  • Google spider traffic is significant on Stack Overflow, and
  • the sitemap only contains entries for the newest 50,000 pages.

Would it be more efficient, in terms of cutting the Google spider traffic, to add every page to the sitemap?

  • It would allow Google to recognize the pages that have not been changed since they were indexed, without accessing those files individually.

  • It would take 40+ sitemap files, but the files with older pages could be updated only once a month or so (for new comments, etc.)

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