If apps were using multicore all over the place, the hardware vendors would have responded by increasing the number of cores on the CPU as they planned to. Instead, they didn&#x27;t, because people aren&#x27;t using it.<p>I don&#x27;t see any particular use the Facebook app would possibly have for multicore. Image and video decoding perhaps, but browsers already multithread those.<p>The point about native frameworks making use of SIMD applies equally to the SIMD that the browser engine components internally use.<p>Finally, I&#x27;ve been writing native code almost exclusively for the past five years.