Re: Design/structure X3 parser more like Qi parser

On 13-12-16 22:55, Larry Evans wrote:
> I want to make sure I'm reading that graph correctly.
> It says that the average time using 'x3 new' is 870,000 ns; whereas
> the average time using 'qi dynamic' is only 137 ns?

Yes. Note you can use the drop-down to see the individual samples, so
you can sense the spread of them too.

Note also you can hide data series by clicking the legend labels.

On 13-12-16 22:04, Michael Powell wrote:
>>> After cleanup, the Qi version is still a lot faster
>>> >> <http://stackoverflow-sehe.s3.amazonaws.com/e44a2c1d-356f-4773-bb51-22d307621a29/stats.html>.
> "A lot"? You are being too modest...
>
Well. I did start off with the bad news because I think it's a
performance /bug/.
I agree that the performance doesn't entice a move to X3 for this
particular grammar :)

I haven't understood it fully but the profiler results seem to point at
`parse_into_container` and `std::....::basic_string::aux_replace`
(quoting from memory)


> BTW, thanks doing this 
>
> -regards,
> Larry
And thanks to Sandro for coming through with the interesting sample code
to manifest this behaviour.


Seth

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most 
engaging tech sites, SlashDot.org! http://sdm.link/slashdot

_______________________________________________
Spirit-general mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/spirit-general