Various species micro-optimizations

Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~4-6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y

Committed: https://crrev.com/f98caf44b80d826227ae5daaac465aa0969a74dc
Cr-Commit-Position: refs/heads/master@{#36121}

[Dan Ehrenberg, 2016-05-06 23:17:08]

Description was changed from

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~5% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y
==========

to

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y
==========

[Dan Ehrenberg, 2016-05-06 23:23:51]

Description was changed from

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y
==========

to

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~4-6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y
==========

[Dan Ehrenberg, 2016-05-09 21:23:21]

The CQ bit was checked by littledan@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-05-09 21:23:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1958713003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1958713003/1

[commit-bot: I haz the power, 2016-05-09 21:42:00]

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

[commit-bot: I haz the power, 2016-05-09 21:42:00]

Dry run: Try jobs failed on following builders:
  v8_linux64_avx2_rel_ng on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng/buil...)
  v8_linux64_avx2_rel_ng_triggered on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel_ng_trig...)

[Dan Ehrenberg, 2016-05-09 22:22:00]

The CQ bit was checked by littledan@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-05-09 22:22:11]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1958713003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1958713003/20001

[commit-bot: I haz the power, 2016-05-09 22:52:40]

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

[commit-bot: I haz the power, 2016-05-09 22:52:41]

Dry run: This issue passed the CQ dry run.

[Camillo Bruni, 2016-05-10 06:47:26]

LGTM, sorry for the delay.

[Dan Ehrenberg, 2016-05-10 06:52:18]

The CQ bit was checked by littledan@chromium.org

[commit-bot: I haz the power, 2016-05-10 06:52:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1958713003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1958713003/20001

[commit-bot: I haz the power, 2016-05-10 06:54:24]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-10 06:54:44]

Description was changed from

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~4-6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y
==========

to

==========
Various species micro-optimizations

- Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~4-6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y

Committed: https://crrev.com/f98caf44b80d826227ae5daaac465aa0969a74dc
Cr-Commit-Position: refs/heads/master@{#36121}
==========

[commit-bot: I haz the power, 2016-05-10 06:54:45]

Patchset 2 (id:??) landed as
https://crrev.com/f98caf44b80d826227ae5daaac465aa0969a74dc
Cr-Commit-Position: refs/heads/master@{#36121}