[NinjaWarrior]

> Emscripten builds taking between 10 and 50 times longer to compile than the native code ones.

Hey, this is fatal. With this massively long iteration time, you can't run actual big projects. Only executing 1,000,000 lines of C++ code is not enough. We care the build time as well as the perforamnce.

BTW, have you heard that the next Haswell processors can get only 5% performance improvement? We should assume that we have no free lunch anymore. One of the UNIX philosophies is already broken.

[boyter]

I thought the Haswell CPU was more about reducing power usage then adding performance? I'd be curious to know how much effort was spent on the power consumption vs performance.

[mratzloff]

Intel is getting their lunch handed to them by ARM. People value power consumption over performance these days, so why would they continue pumping out faster chips?

[berkut]

> BTW, have you heard that the next Haswell processors can get only 5% performance improvement?

Bollocks - using the new gather AVX instructions, I've seen close to a 40% increase over IB on some floating-point code I've hand-written with intrinsics.

Existing C++ code is around 13-16% faster thanks to better cache bandwidth and a huge L4 cache. Turn on FMA (fused multiply–add) optimisation and that goes to ~20% faster.