On 2/23/12 4:15 AM, Antony Polukhin wrote:
Hi,
Boost.Spirit documentation advices to use multi_pass iterators for parsing files (or reading data to a STL container and then passing the begin and end of the container to Spirit.Qi).
Much better solution would be to use a memory mapped file:
[snip]
Comparing to multi_pass iterator, mmap approach increased parsing speed more than 5 times, reduced memory usage and CPU load.
Mmap approach is also a little bit faster than reading data to STL container and mmap sometimes requires less memory (depending on OS).
I think, that such solution should be at least mentioned in Spirit documentation.
Agreed!
May be mmap shall be wrapped in some class for tighter integration with Spirit and simpler usage:
[snip]
Thanks for posting. If you don't mind tweaking your text for publication, I'd gladly post this as an article in Spirit's site. This should be a good addition to the doc addendum page. Regards, -- Joel de Guzman http://www.boostpro.com http://boost-spirit.com