9:43:07jackdanielbug discovered in intel cpu (not fully disclosed yet) will impose up to 30% penalty when fix is applied to OS
9:43:48jackdanielI'm mentioning that, because this is related to memory protection (hence - pointer arithmetics) - some constraints aren't enforced during speculative execution
9:44:21jackdanielbeach: another datapoint for you claim in favor of languages without pointer arithmetics (I think)
9:50:26jackdanieland it is not disclosed yet with all details (only scraps of these)
9:54:39beachWow. They have to remove the kernel address space from user space entirely. I can see how that would be expensive.
10:07:44beachIt is a datapoint in favor of an OS that does not allow for application code to access the full address space, and that does not need to distinguish between user mode and supervisor mode.
10:08:09beachAnd disallowing that implies disallowing pointer arithmetic.
10:14:46jackdanielyes, that's what I meant - if you don't have pointer arithmetic application may access only its own references