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Postings from September 2016
On Mon, Apr 27, 2015 at 09:50:00AM -0300, Vincent Pit (VPIT) wrote:
>
>
> Le 27/04/2015 09:31, Dave Mitchell a écrit :
> > On Sat, Apr 25, 2015 at 10:13:54PM -0300, Vincent Pit (VPIT) wrote:
> > > While porting autovivification.pm to the new multideref optimization, I
> > > realized that while the module was loaded the OP_MULTIDEREF ops were
> > > actually pretty rare :
> > [snip]
> > >
> > > Basically, they only happen for exists and delete constructs, and just for
> > > the last dereferencing. What causes this is this conditional in
> > > S_maybe_multideref() :
> > >
> > > /* if something like arybase (a.k.a $[ ) is in scope,
> > > * abandon optimisation attempt */
> > > if ( (o->op_type == OP_AELEM || o->op_type == OP_HELEM)
> > > && PL_check[o->op_type] != Perl_ck_null)
> > > return;
> > >
> > > This makes a lot of sense, but I wonder if this shouldn't be extended to
> > > topmost OP_EXISTS and OP_DELETE, so that the multideref optimization is also
> > > disabled when they define their own check functions.
> >
> > Sounds like a good idea, although I'd prefer to leave it until after 5.22
> >
>
> Ok, then I'll change it when 5.22 is released.
Now (belatedly) implemented with v5.25.5-44-g81b96c3.
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