------- Comment #8 from rakdver at kam dot mff dot cuni dot cz 2010-01-03
19:37 -------
Subject: Re: Slow compile and much memory use
at -O1
> ------- Comment #7 from rguenth at gcc dot gnu dot org 2010-01-03 17:03
> -------
> Well, obviously it is because
>
> template<typename T>
> gmic& gmic::parse(...)
> {
> ...
> while (position<command_line.size() && !is_quit) {
>
> loop body with 4000 lines of code (well, including lots of lines
> with a few thousand chars, control flow, loops and function calls)
>
> }
> ...
> }
>
> and DF never was good scaling to this kind of code. Maybe not considering
> this outermost loop in LIM will fix the slowness... the limit is currently
> 10000 basic-blocks, maybe a little large when considering non-innermost
> loops.
10000 bbs seems way too large -- even for innermost loops.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42175
