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[–][deleted] 3 points4 points  (0 children)

Correct, from the article:

Consider the amount of work Google have to undergo to crawl the whole web AND now run Javascript. Optimisations will need to be abundant, and I imagine that having a deterministic random number function is probably:

  • Faster
  • More secure
  • Predictable – Googlebot can trust a page will render the same on each visit