There should be little doubt that cryptographically strong PRNGs exist which are just as performant as whatever ridiculous MD4 hack is being used now. Clearly there are cryptographers falling over themselves to try provide the code to Linus & Co.; he's just not hearing it.If so, they're not doing it in that thread. Matt presented a PRNG that was twice as slow as the existing (crappy but cheap) MD4 one, to be used in time-critical contexts like process execution. That's not going to fly, given that that path has attention paid to every last cycle.
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