Em dom., 19 de abr. de 2020 às 22:00, David Rowley
escreveu:
> On Mon, 20 Apr 2020 at 11:24, Ranier Vilela wrote:
> > I tried: https://godbolt.org with:
> >
> > -O2:
> >
> > f1:
> > int main (int argv, char **argc)
> > {
> > return strlen(argc[0]) == 0;
> > }
> >
> > f1: Assembly
> > main:
On Mon, 20 Apr 2020 at 11:24, Ranier Vilela wrote:
> I tried: https://godbolt.org with:
>
> -O2:
>
> f1:
> int main (int argv, char **argc)
> {
> return strlen(argc[0]) == 0;
> }
>
> f1: Assembly
> main: # @main
> mov rcx, qword ptr [rsi]
>
Em dom., 19 de abr. de 2020 às 18:38, Tom Lane escreveu:
> Tomas Vondra writes:
> > On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
> >> strlen it is one of the low fruits that can be harvested.
>
> > Maybe there are places where this would help, but I don't see a reason
> > to ju
Em dom., 19 de abr. de 2020 às 19:00, David Rowley
escreveu:
> On Mon, 20 Apr 2020 at 09:38, Tom Lane wrote:
> > The cases where Ranier proposes to replace strlen(foo) == 0
> > with a test on foo[0] do seem like wins, though. Asking for
> > the full string length to be computed is more computat
On Mon, 20 Apr 2020 at 09:38, Tom Lane wrote:
> The cases where Ranier proposes to replace strlen(foo) == 0
> with a test on foo[0] do seem like wins, though. Asking for
> the full string length to be computed is more computation than
> necessary, and it's less clear that the compiler could be
>
Tomas Vondra writes:
> On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
>> strlen it is one of the low fruits that can be harvested.
> Maybe there are places where this would help, but I don't see a reason
> to just throw away all strlen calls and replace them with something
> clear
On 4/19/20 10:29 PM, Ranier Vilela wrote:
Em dom., 19 de abr. de 2020 às 16:33, Tomas Vondra
mailto:tomas.von...@2ndquadrant.com>>
escreveu:
On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
>Hi,
>strlen it is one of the low fruits that can be harvested.
>What i
On Sun, Apr 19, 2020 at 05:29:52PM -0300, Ranier Vilela wrote:
Em dom., 19 de abr. de 2020 às 16:33, Tomas Vondra <
tomas.von...@2ndquadrant.com> escreveu:
On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
>Hi,
>strlen it is one of the low fruits that can be harvested.
>What is you
Em dom., 19 de abr. de 2020 às 16:33, Tomas Vondra <
tomas.von...@2ndquadrant.com> escreveu:
> On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
> >Hi,
> >strlen it is one of the low fruits that can be harvested.
> >What is your opinion?
> >
>
> That assumes this actually affects/impr
On Sun, Apr 19, 2020 at 11:24:38AM -0300, Ranier Vilela wrote:
Hi,
strlen it is one of the low fruits that can be harvested.
What is your opinion?
That assumes this actually affects/improves performance, without any
measurements proving that. Considering large number of the places you
modified
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