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Pettenò: Debunking x32 mythsPettenò: Debunking x32 mythsPosted Jun 25, 2012 21:44 UTC (Mon) by slashdot (guest, #22014)Parent article: Pettenò: Debunking x32 myths
Well, the data cache utilization that he conveniently doesn't highlight can be huge for some software.
You can probably show a 3x speedup with an ad-hoc benchmark that traverses a randomly arranged linked list that fits exactly in LLC when using 32-bit pointers, since on 4 GHz Sandy Bridge accessing RAM apparently takes 6x as much as accessing LLC.
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