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> It’s also worth noting that while the performance / efficiency gap between x86 and ARM seems to be pretty sizable at this point It's really not, though. You
by kllrnohj 6y ago
> It’s also worth noting that while the performance / efficiency gap between x86 and ARM seems to be pretty sizable at this point
It's really not, though. You have to compare performance at a given power target to judge performance/efficiency, which you can't do for most ARM CPUs. But you can get 8 core x86 CPUs that are 15W, or 1.8w per core (example: the 4800U). Similarly 64 core Epycs are around or less than 3W per core. These are all well within similar per-core power numbers as your typical big-core ARM chip.
The perceived gap is larger than it really is, because there just isn't really an x86 tablet-focused market. The M1's jump into laptop-space puts it up and we can really see it shine, but the other ARM jumps into laptop-space were a joke. So comparing equivalent power targets becomes challenging.
But take your articles benchmarks for example. The Snapdragon manages something like 60% of the performance of the A12's. So take the existing M1 mac, cut the performance drastically, and suddenly it'd be not interesting at all. The performance/efficiency wouldn't be impressive at all if it was getting 60% of the performance it is now.