Avoiding construction of dead dictionaries

[Michael Sperber]

On Mon, Aug 09 2021, Simon Peyton Jones <simonpj at microsoft.com> wrote:

> Could you offer a small repro case, with a pointer to evidence that it matters in practice, and open a ticket?

I'll try my best, but I'm unsure how I would generate evidence.  Could
you give me a hint?

Is there any way to see how far evaluates the dictionary construction to
be able to match on that unboxed tuple?

-- 
Regards,
Mike