Use Bohem's GC for compiler proper in 4.1?

[Zack Weinberg]

Robert Dewar <dewar@adacore.com> writes:
> Zack Weinberg wrote:
>> Last year CodeSourcery had a contract to speed up the C++ front end at
>> -O0, and we found that small linear reductions in memory usage
>> corresponded directly to small linear reductions in time usage, at
>> about a 2:1 ratio (so 1% less memory -> 0.5% less time).  That
>> wouldn't be worth bothering with except that there are *lots* of
>> places where such reductions are available.  We eventually got
>> something like a 40% overall speedup just from this.  (Sorry, I
>> haven't got exact numbers.)
>
> Right I am aware of that work, but we are talking now, so the question
> is do similar opportunities still exist?

Absolutely.  Most of the memory-saving potential discussed in my and
Nathan Sidwell's paper from last GCC summit, for instance, remains
unrealized.

zw