Optimizing Immutable Data?

[David Nadlinger via digitalmars-d-ldc]

On Monday, 6 July 2015 at 19:20:58 UTC, Kai Nacke wrote:
> David was at Dconf. It would be nice if he could repeat his 
> answer here. I am currently unsure to which LLVM feature the 
> speaker referred.

Unfortunately, I don't recall any details – there were many 
discussions at DConf. I'm afraid I need a little help as to which 
specific remark Jack means.

  — David