[lld] r319518 - Add an additional test for r319503.

Rui Ueyama via llvm-commits llvm-commits at lists.llvm.org
Mon Dec 4 17:46:37 PST 2017


On Mon, Dec 4, 2017 at 5:30 PM, Rafael Avila de Espindola <
rafael.espindola at gmail.com> wrote:

> Rui Ueyama <ruiu at google.com> writes:
>
> > On Sat, Dec 2, 2017 at 9:09 AM, Rafael EspĂ­ndola <
> rafael.espindola at gmail.com
> >> wrote:
> >
> >> > This time I just timed the llvm tests when built with shared libraries
> >> >
> >> > gold:                                  138.207661064 seconds time
> elapsed
> >> > lld master:                         143.343427881 seconds time elapsed
> >> > cutting bloom filter in half: 148.267076771 seconds time elapsed
> >> > bloom filter of size 1:         180.053104591 seconds time elapsed
> >
> >
> > Did you know why gold is faster than us?
>
> Some of it is the number of buckets. Going from /4 to /2 in lld takes
> the test time to 142.5 seconds.
>

Thanks. But that doesn't explain the difference that much though.

I can't think of any other parameters we can tweak to optimize the
.gnu.hash table, so the difference might come from differences in other
parts of the DSOs.
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