[commit: ghc] master: SrcLoc: Eliminate constructors of RealSrcSpan (987426c)

[Ben Gamari]

Simon Peyton Jones <simonpj at microsoft.com> writes:

> Does this change yield any benefits?  Eg. if we can now unbox SrcLoc does something go faster?
>
Compiler allocations in the testsuite decrease between 0 and 1% [1].

Moreover, it still seemed like a reasonable clean-up given it is a
net reduction in code length with no loss of clarity.

Cheers,

- Ben


[1] https://perf.haskell.org/ghc/#table-6
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