Until it's proven not to be so, through another POC.
And then OPs point stands: Lots of Intel's performance gains since the 90s has been through out-of-order execution and branch-prediction.
If those improvements are deemed incompatible with being able to securely run JS in your browser, I would argue Intel is having a very fundamental problem now.
Hopefully AMD does better, but I don't think they are entirely immune to this category of security-issues either.
No, it's optional in the sense of you choosing to enable it.
I also suspect the performance hit will be minimal, however I'm not an expert.
> If those improvements are deemed incompatible with being able to securely run JS in your browser, I would argue Intel is having a very fundamental problem now.
Well it is, yet people are overwhelmingly willing to expose a turing complete language controlled by some 3rd party they know little or nothing about directly to the open internet. The problem there is nothing to do with hardware. It's people.
Until it's proven not to be so, through another POC.
And then OPs point stands: Lots of Intel's performance gains since the 90s has been through out-of-order execution and branch-prediction.
If those improvements are deemed incompatible with being able to securely run JS in your browser, I would argue Intel is having a very fundamental problem now.
Hopefully AMD does better, but I don't think they are entirely immune to this category of security-issues either.