Hi,

王淳洋 via Gcc-help <gcc-help@gcc.gnu.org> writes:

> Hello, I am using -flto when building nginx, but got lower benchmark
> scores, about -1%~-2%, which makes me confused.

That's not impossible, as benchmark results can be influenced by a
myriad of factors.

> I am wondering if there are other options to be combined with -flto, to
> make the best optimization.

The usual optimization flags.  And, as usual, there's no silver bullet.

> By the way, will lto acts on the process of merging .o to generate .a
> .

No - only at time of use of the '.a'.
-- 
Arsen Arsenović