[turbofan] Tune the ValueNumberingReducer's growth rate

[turbofan] Tune the ValueNumberingReducer's growth rate

Changes the ValueNumberingReducer to grow when at 80% capacity, rather
than at 50% capacity. This matches the behaviour of base/hashmap.

Committed: https://crrev.com/a902ef88a39b6fde2774522486191ce0f8ba37ea
Cr-Commit-Position: refs/heads/master@{#40734}

[Leszek Swirski, 2016-11-03 13:35:58]

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

[commit-bot: I haz the power, 2016-11-03 13:36:01]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-03 14:03:44]

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

[commit-bot: I haz the power, 2016-11-03 14:03:45]

Dry run: This issue passed the CQ dry run.

[Leszek Swirski, 2016-11-03 14:08:07]

leszeks@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Leszek Swirski, 2016-11-03 14:08:07]

Hey Benedikt,

I'm seeing a reasonable performance boost locally from this change, on most of
Octane (small regression on Raytrace, might just be noise):

Box2D
Δmean: 1.89%
Δmedian: 4.24%

Crypto
Δmean: 1.63%
Δmedian: 1.96%

DeltaBlue
Δmean: 7.32%
Δmedian: 7.84%

EarleyBoyer
Δmean: 5.19%
Δmedian: 6.28%

Gameboy
Δmean: 3.54%
Δmedian: 3.02%

Mandreel
Δmean: 0.684%
Δmedian: 1.34%

RayTrace
Δmean: 0.174%
Δmedian: 2.17%

RegExp
Δmean: -0.972%
Δmedian: -0.396%

Richards
Δmean: 3.61%
Δmedian: 4.04%

Typescript
Δmean: 2.5%
Δmedian: 2.92%

[Benedikt Meurer, 2016-11-03 16:11:59]

Nice, LGTM.

[Leszek Swirski, 2016-11-03 16:12:56]

The CQ bit was checked by leszeks@chromium.org

[commit-bot: I haz the power, 2016-11-03 16:13:04]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-03 16:14:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-17 22:21:01]

Description was changed from

==========
[turbofan] Tune the ValueNumberingReducer's growth rate

Changes the ValueNumberingReducer to grow when at 80% capacity, rather
than at 50% capacity. This matches the behaviour of base/hashmap.
==========

to

==========
[turbofan] Tune the ValueNumberingReducer's growth rate

Changes the ValueNumberingReducer to grow when at 80% capacity, rather
than at 50% capacity. This matches the behaviour of base/hashmap.

Committed: https://crrev.com/a902ef88a39b6fde2774522486191ce0f8ba37ea
Cr-Commit-Position: refs/heads/master@{#40734}
==========

[commit-bot: I haz the power, 2016-11-17 22:21:05]

Patchset 1 (id:??) landed as
https://crrev.com/a902ef88a39b6fde2774522486191ce0f8ba37ea
Cr-Commit-Position: refs/heads/master@{#40734}