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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