[GNC-dev] Slow user interface in 3.x gnucash (for large files), and potential optimization
warlord at MIT.EDU
Fri Jun 15 12:16:27 EDT 2018
John Ralls <jralls at ceridwen.us> writes:
> A very good catch indeed. But pre-constructing the string in
> qofbook.cpp only saves two string constructions per invocation as the
> vector still has to make its own copies. I guess that its much worse
> for you because the ancient gcc on Ubuntu 14.04 (gcc4.8) doesn't do
> small-string optimization.
Is there any reason we cant use std::string& in the vector? Or do we
think that we might lose references there?
> KVP paths aren't really a good use for std::string anyway: It's a lot
> of weight for something that's used as a human-readable index. Even
> static char is heavy for this purpose. We could get a huge boost if
> we use something like Glib's quarks . They can be expanded to their
> string value for storage so that we don't break file/db compatibility.
> Want to have a go at that?
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warlord at MIT.EDU PGP key available
More information about the gnucash-devel