What are the advantages of 301 redirects over rel="canonical"?

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Опубликовано 11 декабря 2012, 18:16
In the 2009 rel=canonical video, you suggest using rel=canonical when we CAN'T use a 301 redirect. But 301s hurt performance; they require browsers to make an extra round-trip to my servers. Shouldn't I use rel=canonical everywhere, instead of 301s?
Dan Fabulich, San Francisco, CA

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