Android - ARM performance improvments?

[Michael Braithwaite]

Hi,

Does anyone know if the current performance of V8 on ARM Android is expected to markedly improve or are the main wins already implemented? 

To give a comparison these were from Chrome Beta on Android (v25) and the current Chrome on desktop (also v25).

	V8	Octane
Nexus 10 1.7 GHz dual-core Cortex-A15[1]	3916	3959
Nexus 7 1.2 GHz (1.3 GHz in single-core mode) quad-core Cortex-A9	1665	1687
Nexus 4 1.5 GHz quad-core Krait	1826	1759
Win 7 : 2.67GHz core i5	15053	15148
Win 7: 1.3 GHz Celeron 743	4648	4037
OSX 10.7 : 2.53 GHz Core 2 Duo	9677	9868

 

Michael.

[Michael Schwartz]

You're comparing ARMv7 RISC based CPUs with 32 bit architecture (limited 64 bit support) with much more powerful x64 CPUs.

That said, the Nexus 10 being competitive with the Celeron 743 is pretty impressive, no?

(I'm not answering the question of whether the v8 implementation for ARM is optimal)

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[Yang Guo]

Hi Michael,

generally it's hard to impossible to give a road map on performance optimizations. If I'm not mistaken, some ARM-specific performance improvements are still in the pipeline, and we are working on more to come. Generally however we prefer implementing optimizations that work across all platforms.

That being said, if you are familiar with ARM, you are welcome to contribute!

Yang