[heap] Optimize migration of objects round two

[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N

Committed: https://crrev.com/fddd4f06f9d6c75a0017c1ba6f33337d984d76cf
Cr-Commit-Position: refs/heads/master@{#34988}

[Michael Lippautz, 2016-03-22 12:18:19]

mlippautz@chromium.org changed reviewers:
+ hpayer@chromium.org

[Michael Lippautz, 2016-03-22 12:18:19]

PTAL

Threading the templates all the way through is a major pain as we have those
instances on the stack, or would need to templatize iteration functions (e.g.
IterateLiveObjects). Locally caching and dispatching to the right migrate
function provides the same speedup.

[Hannes Payer (out of office), 2016-03-22 12:24:57]

lgtm

[Michael Lippautz, 2016-03-22 12:26:23]

Description was changed from

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N
==========

to

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N
==========

[Michael Lippautz, 2016-03-22 12:26:23]

mlippautz@chromium.org changed reviewers:
+ ulan@chromium.org

[Michael Lippautz, 2016-03-22 12:26:28]

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

[commit-bot: I haz the power, 2016-03-22 12:26:37]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1820263002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1820263002/20001

[ulan, 2016-03-22 12:32:31]

lgtm

[commit-bot: I haz the power, 2016-03-22 12:41:24]

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

[commit-bot: I haz the power, 2016-03-22 12:41:25]

Dry run: Try jobs failed on following builders:
  v8_linux64_avx2_rel on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_linux64_avx2_rel/builds/...)

[Michael Lippautz, 2016-03-22 12:46:12]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2016-03-22 12:46:12]

The patchset sent to the CQ was uploaded after l-g-t-m from hpayer@chromium.org,
ulan@chromium.org
Link to the patchset: https://codereview.chromium.org/1820263002/#ps40001
(title: " ")

[commit-bot: I haz the power, 2016-03-22 12:46:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1820263002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1820263002/40001

[commit-bot: I haz the power, 2016-03-22 13:22:44]

Description was changed from

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N
==========

to

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N
==========

[commit-bot: I haz the power, 2016-03-22 13:22:45]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-03-22 13:24:06]

Description was changed from

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N
==========

to

==========
[heap] Optimize migration of objects round two

* Not jump around all memory to gather whether we need to profile
* Cache this information and dispatch to a templatized function

BUG=chromium:524425
LOG=N

Committed: https://crrev.com/fddd4f06f9d6c75a0017c1ba6f33337d984d76cf
Cr-Commit-Position: refs/heads/master@{#34988}
==========

[commit-bot: I haz the power, 2016-03-22 13:24:07]

Patchset 3 (id:??) landed as
https://crrev.com/fddd4f06f9d6c75a0017c1ba6f33337d984d76cf
Cr-Commit-Position: refs/heads/master@{#34988}