On Sun, Apr 9, 2017 at 4:41 PM, Markus Trippelsdorf <mar...@trippelsdorf.de> wrote: > The minimum size heuristic for the garbage collector's heap, before it > starts collecting, was last updated over ten years ago. > It currently has a hard upper limit of 128MB. > This is too low for current machines where 8GB of RAM is normal. > So, it seems to me, a new upper bound of 1GB would be appropriate. > > Compile times of large C++ projects improve by over 10% due to this > change.
How does memory use change? > What do you think? Personally I think it's a bit late for GCC 7. Richard. > Thanks. > > > diff --git a/gcc/ggc-common.c b/gcc/ggc-common.c > index b4c36fb0bbd4..91e121d7dafe 100644 > --- a/gcc/ggc-common.c > +++ b/gcc/ggc-common.c > @@ -810,7 +810,7 @@ ggc_min_heapsize_heuristic (void) > phys_kbytes = MIN (phys_kbytes, limit_kbytes); > > phys_kbytes = MAX (phys_kbytes, 4 * 1024); > - phys_kbytes = MIN (phys_kbytes, 128 * 1024); > + phys_kbytes = MIN (phys_kbytes, 1000 * 1024); > > return phys_kbytes; > } > > -- > Markus
