opt out of accursedUnutterablePerformIO

[Tom Murphy]

John, are you able to share this benchmarking code?

Thanks,
Tom

On Mon, Mar 5, 2018 at 12:07 AM, John Wiegley <johnw at newartisans.com> wrote:

> >>>>> "DF" == David Feuer <david.feuer at gmail.com> writes:
>
> DF> For the record, the "public" version of runRW# is called
> DF> unsafeDupablePerformIO. It would be a good idea to find out if it can
> DF> be used throughout bytestring without a significant penalty. If so,
> DF> that would eliminate a bunch of scary stuff. If not, it would be nice
> DF> to understand why.
>
> In my tests, using unsafeDupablePerformIO instead of
> accursedUnutterablePerformIO induces a 15% performance penalty.
>
> --
> John Wiegley                  GPG fingerprint = 4710 CF98 AF9B 327B B80F
> http://newartisans.com                          60E1 46C4 BD1A 7AC1 4BA2
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