On 08/09/19 16:44 +0300, Antony Polukhin wrote:
We've already beaten this topic to death, so let's put a final nail in
the coffin:
__to_chars_10_impl is quite fast. According to the IACA the main loop
takes only 6.0 cycles, the whole function with one iteration takes
10.0 cycles. Replacing the __first[pos] and __first[pos - 1] with
__first[0] and __first[1] drops the function time to 7.53 cycles.
Changelog:
2019-09-08 Antony Polukhin <antosh...@gmail.com>
* include/bits/charconv.h (__detail::__to_chars_10_impl): Replace
final offsets with constants.
Excellent, thanks for the patch and all the benchmarking!
I've committed this to trunk now.
