[em3rgent0rdr]

No only different instruction set, but probably drastically different cache hierarchy and branch predictors. The tool cachegrind which they are using is simulating a program's effect on the cache and branch predictor, which will likely both be dramatically smaller in embedded devices vs modern server CPUs, so the results may be very misleading to real world applications for sqite.

[pcwalton]

Also multicore memory hierarchies are very different on ARM -- e.g. atomics are much more expensive there in my experience.