| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [HACKERS] "may be unused" warnings for gcc |
| Date: | 2019-09-27 21:23:48 |
| Message-ID: | 20190927212348.3x5njykipgmnyru4@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 2017-02-22 09:26:10 -0500, Peter Eisentraut wrote:
> On 2/21/17 22:17, Andres Freund wrote:
> > I've not run comparisons this year, but late last year I was seeing > 5%
> > < 10% benefits - that seems plenty enough to care.
>
> You mean the 5-minute benchmarks on my laptop are not representative? ;-)
>
> Here is a patch that I had lying around that clears the compiler
> warnings under -O3 for me. It seems that they are a subset of what you
> are seeing. Plausibly, as compilers are doing more analysis in larger
> scopes, we can expect to see more of these.
I pushed the subset that I still see locally with gcc -O3.
Greetings,
Andres Freund
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