[llvm-dev] UTF-8 conversion speed

[Friedman, Eli via llvm-dev]

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.

-Eli

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