On Wed, Jan 22, 2020 at 10:53 PM Han-Wen Nienhuys <hanw...@gmail.com> wrote:
> > > On Wed, Jan 22, 2020 at 12:01 PM David Kastrup <d...@gnu.org> wrote: > >> >> > So, what hard data do we have on GUILE 2/3 slowness, and what does >> > that data say? >> >> That data says "humongous slowdown". There is not much more than >> speculation what this is caused by as far as I know. >> > > I can see the 2x slowdown, and it looks uniformly distributed over the > whole process. The GUILE 2.0 release > Actually, the I was comparing the -O2 build with the -O0 build. When recompiling, the Scheme init (reading .scm files) takes 0.31s in 1.8 vs. 2.7s in 2.0, a 9x slowdown. > https://lwn.net/Articles/428288/ > > has one big red flag for me. > > * Switch to the Boehm-Demers-Weiser garbage collector > > Guile now uses the Boehm-Demers-Weiser conservative garbage collector > (aka. libgc). It makes interaction with C code easier making, for > instance, the use of mark and free SMOB procedures optional in many > cases. It also improves performance. > > let me get out the profiler to see what is going on. > > -- > Han-Wen Nienhuys - hanw...@gmail.com - http://www.xs4all.nl/~hanwen > -- Han-Wen Nienhuys - hanw...@gmail.com - http://www.xs4all.nl/~hanwen
