[runtime] Minimize runtime call stats overhead when it is disabled.

[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N

Committed: https://crrev.com/9cda0abdde0784cf5b5664b2c8a929e00a57075b
Cr-Commit-Position: refs/heads/master@{#36162}

[Igor Sheludko, 2016-05-10 22:36:24]

Description was changed from

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

BUG=chromium:596055
LOG=N
==========

to

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N
==========

[Igor Sheludko, 2016-05-10 22:36:30]

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

[commit-bot: I haz the power, 2016-05-10 22:36:41]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1965133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1965133002/1

[Igor Sheludko, 2016-05-10 22:37:08]

ishell@chromium.org changed reviewers:
+ cbruni@chromium.org

[Igor Sheludko, 2016-05-10 22:37:09]

PTAL

[commit-bot: I haz the power, 2016-05-10 23:09:09]

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

[commit-bot: I haz the power, 2016-05-10 23:09:10]

Dry run: This issue passed the CQ dry run.

[Camillo Bruni, 2016-05-11 08:39:38]

nice work :) LGTM

[Igor Sheludko, 2016-05-11 08:39:59]

The CQ bit was checked by ishell@chromium.org

[commit-bot: I haz the power, 2016-05-11 08:40:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1965133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1965133002/1

[commit-bot: I haz the power, 2016-05-11 08:43:20]

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

[commit-bot: I haz the power, 2016-05-11 08:43:20]

Try jobs failed on following builders:
  v8_presubmit on tryserver.v8 (JOB_FAILED,
http://build.chromium.org/p/tryserver.v8/builders/v8_presubmit/builds/15014)

[ulan, 2016-05-11 08:47:08]

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

[ulan, 2016-05-11 08:47:08]

heap lgtm

[Igor Sheludko, 2016-05-11 08:48:17]

The CQ bit was checked by ishell@chromium.org

[commit-bot: I haz the power, 2016-05-11 08:48:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1965133002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1965133002/1

[commit-bot: I haz the power, 2016-05-11 08:49:39]

Description was changed from

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N
==========

to

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N
==========

[commit-bot: I haz the power, 2016-05-11 08:49:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-11 08:51:33]

Description was changed from

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N
==========

to

==========
[runtime] Minimize runtime call stats overhead when it is disabled.

... by
1) avoiding accessing RuntimeCallStats instance,
2) avoiding calculating address of a counter field,
3) and using statically known pointer to a member counter instead.

And in addition some code cleanup.

BUG=chromium:596055
LOG=N

Committed: https://crrev.com/9cda0abdde0784cf5b5664b2c8a929e00a57075b
Cr-Commit-Position: refs/heads/master@{#36162}
==========

[commit-bot: I haz the power, 2016-05-11 08:51:34]

Patchset 1 (id:??) landed as
https://crrev.com/9cda0abdde0784cf5b5664b2c8a929e00a57075b
Cr-Commit-Position: refs/heads/master@{#36162}