Heuristic optimization in expression classifiers

Heuristic optimization in expression classifiers

This patch optimizes a frequently occurring case, where a
ArrowFormalParametersProduction error in the list is skipped and
this forces all the remaining errors to be shifted left.  Shifting
is expensive and is avoided here, at the cost of (sometimes)
wasting the slot of the ArrowFormalParametersProduction error
in the list.

It depends on https://codereview.chromium.org/1708193003,
the patch that aims to reduce memory footprint of expression
classifiers.

R=rossberg@chromium.org
BUG=

[rossberg, 2016-05-30 13:00:08]

Lgtm, but you may want Adam's opinion, too. (Though he is away right now, so
maybe land it anyways. :) )

[nickie, 2016-05-30 13:02:10]

On 2016/05/30 13:00:08, rossberg wrote:
> Lgtm, but you may want Adam's opinion, too. (Though he is away right now, so
> maybe land it anyways. :) )

I'm still benchmarking this and a couple of other versions.  I'll let you and
Adam know when this is ready.

[nickie, 2016-06-10 16:40:22]

On 2016/05/30 13:02:10, nickie wrote:
> On 2016/05/30 13:00:08, rossberg wrote:
> > Lgtm, but you may want Adam's opinion, too. (Though he is away right now, so
> > maybe land it anyways. :) )
> 
> I'm still benchmarking this and a couple of other versions.  I'll let you and
> Adam know when this is ready.

This is abandoned, in favour of https://codereview.chromium.org/1708193003/

[nickie, 2016-06-10 16:40:30]

Description was changed from

==========
Heuristic optimization in expression classifiers

This patch optimizes a frequently occurring case, where a
ArrowFormalParametersProduction error in the list is skipped and
this forces all the remaining errors to be shifted left.  Shifting
is expensive and is avoided here, at the cost of (sometimes)
wasting the slot of the ArrowFormalParametersProduction error
in the list.

It depends on https://codereview.chromium.org/1708193003,
the patch that aims to reduce memory footprint of expression
classifiers.

R=rossberg@chromium.org
BUG=
==========

to

==========
Heuristic optimization in expression classifiers

This patch optimizes a frequently occurring case, where a
ArrowFormalParametersProduction error in the list is skipped and
this forces all the remaining errors to be shifted left.  Shifting
is expensive and is avoided here, at the cost of (sometimes)
wasting the slot of the ArrowFormalParametersProduction error
in the list.

It depends on https://codereview.chromium.org/1708193003,
the patch that aims to reduce memory footprint of expression
classifiers.

R=rossberg@chromium.org
BUG=
==========