Re: Use Bohem's GC for compiler proper in 4.1?

[Stefan Strasser <sstrasser at systemhaus-gruppe dot de>]

Kaveh R. Ghazi schrieb:
>  > I do have swapping on a 1 GB machine with 2 CPUs(-> 2 GCCs)
>
> If you can demonstrate that say GCC-4.0 uses much more memory than 3.4
> or 3.3 to compile some code, then file a PR with preprocessed source
> and someone will eventually look at it.

I haven't thought about a regression, I was only using 3.4, but look at 
this:

                mem peak    user   sys

gcc 3.4 -S -O0   476 MB    1m39s   2s
gcc 4.0 -S -O0   655 MB    2m23s   3s

icc -S -O0       264 MB    1m24s  15s


the file makes quite heavy use of virtual inheritance so there are a lot 
of virtual tables involved. are there any known performance bugs in this 
area or should I file a PR?

any suggestions on how to simplify the testcase? (preprocessed is ~60k 
lines)


--
Stefan Strasser