Four times faster printf %e for num_put

[Povilas Kanapickas]

On 01/14/2014 04:36 PM, Jonathan Wakely wrote:
> On 12/01/14 11:37 +0100, Paolo Carlini wrote:
>>
>> Note that we are in Stage 3, certainly not the right time for such kind of change.
> 
> For details of what this means see http://gcc.gnu.org/develop.html
> 
> After GCC 4.9 has been released we will be back in Stage 1 when changes
> like this can be made, so we should reconsider your proposal at that
> time.  Before then, as we've said, you should fulfill the legal
> prerequisites at
> http://gcc.gnu.org/onlinedocs/libstdc++/manual/appendix_contributing.html#list.copyright
> 

The proposal wasn't a patch per se, only a prototype implementation
showing what gains are possible. I was expecting to receive something
like either of the following responses:

 * That's a good idea, go prepare a proper patch and fill in the legal
paperwork, then get back when stage 1 starts.

 * It's a fundamentally wrong idea, will not be implemented in the
libstdc++ codebase because of XYZ.

As of now, it's not clear whether the design makes sense to the
maintainers at all. Without some kind of 'go ahead' feedback, I'm a bit
reluctant to put further work into it. Legal prerequisites are under way
though.

Regards,
Povilas