Re: [PATCH 5/7] completion: fix expansion issues in __gitcomp_nl()

[SZEDER Gábor]

On Sat, Nov 17, 2012 at 12:50:39PM +0100, Felipe Contreras wrote:
> On Sat, Nov 17, 2012 at 12:05 PM, SZEDER Gábor <sze...@ira.uka.de> wrote:
> 
> >  __gitcomp_nl ()
> >  {
> >         local IFS=$'\n'
> > -       COMPREPLY=($(compgen -P "${2-}" -S "${4- }" -W "$1" -- "${3-$cur}"))
> > +       COMPREPLY=($(awk -v pfx="${2-}" -v sfx="${4- }" -v cur="${3-$cur}" '
> > +               BEGIN {
> > +                       FS="\n";
> > +                       len=length(cur);
> > +               }
> > +               {
> > +                       if (cur == substr($1, 1, len))
> > +                               print pfx$1sfx;
> > +               }' <<< "$1" ))
> >  }
> 
> Does this really perform better than my alternative?
> 
> +       for x in $1; do
> +               if [[ "$x" = "$3"* ]]; then
> +                       COMPREPLY+=("$2$x$4")
> +               fi
> +       done

It does:

  My version:

    $ refs="$(for i in {0..9999} ; do echo branch$i ; done)"
    $ time __gitcomp_nl "$refs"

    real    0m0.109s
    user    0m0.096s
    sys     0m0.012s

  Yours:

    $ time __gitcomp_nl "$refs"

    real    0m0.321s
    user    0m0.312s
    sys     0m0.008s

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