wasm may well be much more efficient and less resource intensive than JS. Seems likely enough, given the analogue of ASM on most machines. But, then again, mos

wasm may well be much more efficient and less resource intensive than JS. Seems likely enough, given the analogue of ASM on most machines. But, then again, most people don't write ASM. They target it. So in practice, the performance of apps taking advantage of wasm will have a lot to do with compilers and the culture/choices developers bring to writing the software targeted at the browser-as-runtime.