On 10/1/21 6:07 PM, Brodie Gaslam via R-devel wrote:
On Thursday, September 30, 2021, 01:25:02 PM EDT,
wrote:
On Thu, 30 Sep 2021, brodie gaslam via R-devel wrote:
André,
I'm not an R core member, but happen to have looked a little bit at this
issue myself. I've seen similar things on
> Mildly related (?) to this discussion, if you happen to be in a situation
> where you know something is a C NAN, but need to check if its a proper R
> NA, the R_IsNA function is surprisingly (to me, at least) expensive to do
> in a tight loop because it calls the (again, surprisingly expensive
> On Thursday, September 30, 2021, 01:25:02 PM EDT,
> wrote:
>
>> On Thu, 30 Sep 2021, brodie gaslam via R-devel wrote:
>>
>> André,
>>
>> I'm not an R core member, but happen to have looked a little bit at this
>> issue myself. I've seen similar things on Skylake and Coffee Lake 2
>> (9700,
Mildly related (?) to this discussion, if you happen to be in a situation
where you know something is a C NAN, but need to check if its a proper R
NA, the R_IsNA function is surprisingly (to me, at least) expensive to do
in a tight loop because it calls the (again, surprisingly expensive to me)
On Thu, 30 Sep 2021, brodie gaslam via R-devel wrote:
André,
I'm not an R core member, but happen to have looked a little bit at this
issue myself. I've seen similar things on Skylake and Coffee Lake 2
(9700, one generation past your latest) too. I think it would make sense
to have some
