[core.reflect] TemplateInstance reflection

[Elronnd]

On Thursday, 30 September 2021 at 22:19:33 UTC, Stefan Koch wrote:
> preliminary tests show that the reflection data-creation scales 
> linearly

I feel like all I ever do when you show off your incredible work 
on core.reflect or newctfe is propose completely impractical 
changes.  Well, let me propose another one :)

Have you considered using the same in-memory layout for the 
compiler's own structures as for the core.reflect ones, so it's 
not linear-time but constant-time?