Is RDTSC pure?

[IchorDev]

On Sunday, 14 September 2025 at 02:50:42 UTC, Jonathan M Davis 
wrote:
> Memory gets weird on top of that because of the desire to use 
> the GC with pure functions and the argument that two objects 
> with the same value are the same even though they're different 
> places in memory (so whether they're really the same or not 
> depends on what you're looking to guarantee). But even when a 
> pure function returns a newly allocated object, every time that 
> that function is called with the same arguments, the resulting 
> object needs have the same value as any of the other calls. So, 
> while the objects may not be the same objects in memory, they 
> need to have the same value.

Thank you very much for the utterly comprehensive explanation. I 
think it cleared up any confusion that I had about this issue. 
The spec should probably clarify that allocating memory 
necessarily makes a function weakly pure.