[llvm-dev] UTF-8 conversion speed

[David Blaikie via llvm-dev]

Probably best to leave the license lawyering to lawyers & not public
mailing lists.

On Wed, Oct 3, 2018 at 3:55 AM Joerg Sonnenberger via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> On Wed, Oct 03, 2018 at 09:14:30AM +0100, Stephen Kelly via llvm-dev wrote:
> > On 02/10/18 22:58, Friedman, Eli via llvm-dev wrote:
> > > On 10/2/2018 2:27 PM, via llvm-dev wrote:
> > > > At CPPcon last week, I saw a talk by Bob Steagall called
> > > > "Fast Conversion From UTF-8 with C++, DFAs, and SSE Intrinsics."
> > > > Part of this talk included data from a half-dozen or so conversion
> > > > libraries... one of which was labeled "LLVM".
> > > >
> > > > The LLVM converters were invariably the slowest.
> > >
> > > UTF conversion is not on any hot paths, as far as I know, so nobody has
> > > spent any time optimizing it.  If you're interested in the history of
> > > the LLVM code, see https://reviews.llvm.org/rC68208 ; it's mostly
> > > untouched since then, except for a few bugfixes.
> >
> > Given
> >
> >  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823100
> >
> >  https://bugs.llvm.org/show_bug.cgi?id=32962
> >
> > I think moving away from it should be encouraged, assuming use of that
> file
> > can be removed.
>
> That bug is clearly bogus. Whether the copyright indication is correct
> is a separate question, but the claim of the PR is just wrong.
>
> Joerg
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