Not sure why you conclude that code caching is going to benefit from this.
Code caching really just helps you bypass compiling. What test results are
you looking for?


On Wed, Apr 5, 2017 at 7:08 AM 阿炳 <[email protected]> wrote:

Great. So I think the code cache of new architecture will have some
performance profits, are there any test results?


On Wednesday, April 5, 2017 at 12:57:18 PM UTC+8, Yang Guo wrote:

1. two. Ignition and TurboFan
2. yes.

Cheers,

Yang

On Wed, Apr 5, 2017, 06:34 阿炳 <[email protected]> wrote:

Great news.

I have two questions:
1. We knows JSC have 4 tiers, LLint => Baseline JIT ==> DFG ==> FLT, after
v8 shipped new architecture,  how many tiers does V8 have?
2. Whether the code cache of new architecture is byte code generated by
Ignition?

Albert.


On Thursday, March 9, 2017 at 9:18:40 PM UTC+8, Michael Hablich wrote:

Hi,

We already announced
<https://groups.google.com/d/msg/v8-dev/YXpjhVeHlbI/iiYlrF8vCgAJ> our plans
to switch on V8's new compiler architecture based on Ignition+TurboFan a
few weeks ago. This just happened (CL: V8 repo
<https://chromium.googlesource.com/v8/v8/+/0f716acadaed1d9e194593543dbe1340d600d6fc>
and Chromium repo
<https://chromium.googlesource.com/chromium/src/+/5e921f820bc0a86566e25b279019ba965535230e>
)!

This change is currently rolling into Chromium and running through
Chromium's whole test machinery. Rest assured that we already A/B-tested
the new pipeline extensively on Chromeperf, Clusterfuzz and Chrome
Canary/Dev. We don't anticipate regressions except on some traditional
synthetic JavaScript benchmarks like Octane.

Nevertheless, if you spot any regressions or failures please block this
rollout tracking bug
<https://bugs.chromium.org/p/chromium/issues/detail?id=698746>. We will
than work on resolving those blockers.

If you have questions, please do not hesitate to contact me.

Cheers,

Michael

PS: The launch bug is crbug.com/692409
<https://bugs.chromium.org/p/chromium/issues/detail?id=692409>
PPS: Added on-duty sheriffs to CC.

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