[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}

Committed: https://crrev.com/8e8bd866a47297672cc75e57320bbcff0a77d6f2
Cr-Commit-Position: refs/heads/master@{#33415}

[Benedikt Meurer, 2016-01-20 06:57:04]

Hey Yang,

Here's the change to getOwnPropertyDescriptor we talked about.
Please take a look.

Thanks,
Benedikt

[Yang, 2016-01-20 07:52:53]

On 2016/01/20 06:57:04, Benedikt Meurer wrote:
> Hey Yang,
> 
> Here's the change to getOwnPropertyDescriptor we talked about.
> Please take a look.
> 
> Thanks,
> Benedikt

LGTM. nice!

[Benedikt Meurer, 2016-01-20 07:54:09]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-01-20 07:54:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1607943003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1607943003/1

[commit-bot: I haz the power, 2016-01-20 07:55:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-01-20 07:56:32]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

R=yangguo@chromium.org
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

[commit-bot: I haz the power, 2016-01-20 07:56:33]

Patchset 1 (id:??) landed as
https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}

[Michael Hablich, 2016-01-20 11:54:24]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1604243002/ by hablich@chromium.org.

The reason for reverting is: Predecessor CL suspect for roll breakage:
https://codereview.chromium.org/1610563002.

[Benedikt Meurer, 2016-01-20 17:53:28]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

[Benedikt Meurer, 2016-01-20 18:00:36]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

[Benedikt Meurer, 2016-01-20 18:00:49]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-01-20 18:00:49]

The patchset sent to the CQ was uploaded after l-g-t-m from yangguo@chromium.org
Link to the patchset: https://codereview.chromium.org/1607943003/#ps20001
(title: "REBASE")

[commit-bot: I haz the power, 2016-01-20 18:00:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1607943003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1607943003/20001

[commit-bot: I haz the power, 2016-01-20 18:01:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-01-20 18:01:53]

Try jobs failed on following builders:
  win_chromium_rel_ng on tryserver.chromium.linux (JOB_FAILED, no build URL)

[Benedikt Meurer, 2016-01-20 18:05:12]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

[Benedikt Meurer, 2016-01-20 18:05:40]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-01-20 18:05:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1607943003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1607943003/20001

[commit-bot: I haz the power, 2016-01-20 19:04:11]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

[commit-bot: I haz the power, 2016-01-20 19:04:11]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-20 19:04:50]

Description was changed from

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}
==========

to

==========
[runtime] Introduce maps for the likely cases of FromPropertyDescriptor.

This change improves performance for the common case of
Object.getOwnPropertyDescriptor by up 3x-4x, where we just
return a property descriptor object for a regular data or
accessor property.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win_chromium_rel_ng
R=yangguo@chromium.org

Committed: https://crrev.com/ffa9e82235b20c523ebb1151c6196bc6232296b9
Cr-Commit-Position: refs/heads/master@{#33398}

Committed: https://crrev.com/8e8bd866a47297672cc75e57320bbcff0a77d6f2
Cr-Commit-Position: refs/heads/master@{#33415}
==========

[commit-bot: I haz the power, 2016-01-20 19:04:52]

Patchset 2 (id:??) landed as
https://crrev.com/8e8bd866a47297672cc75e57320bbcff0a77d6f2
Cr-Commit-Position: refs/heads/master@{#33415}