iPhone update for Meltdown-Spectre: before/after performance benchmarks
this leads me to a couple questions, hopefully you smart folk can answer:1. I thought Spectre was "Intel-only", and Meltdown was the general case, which is less severe but effectively nearly everywhere?  If so, how is an iPhone susceptible to Spectre?2. Beyond that, I thought meltdown/spectre was an x86 problem.  So why all this trouble on phones, with ARM?3. I've read the first, simplest variant of meltdown, and it is so beautifully simple.  Is this "speculative execution + cache timing" thing an entirely novel exploit, or have we seen incarnations of this before?