[lively-kernel] JavaScript performance on iPhone and iPad [was: Perf Profiling]

Dan Ingalls danhhingalls at gmail.com
Tue May 4 04:45:26 CEST 2010

At Phil's suggestion, I just tried Opera mini and AtomicWeb.  Opera Mini is twice as fast but seems only to be an iPhone app (tiny screen) at this time.

iPad numbers for Opera Mini are...
	50M simple ops/sec
	1.7M sends/sec

AtomicWeb gives essentially the same numbers as Safari; it's probably a Webkit browser.

	- Dan

>Using my benchmark page, http://weather-dimensions.com/Dan/JavaScriptBenchmark.html
>On my 2-year old Mac Powerbook (2.4 GHz Core 2 Duo) I get
>	815M simple ops/sec
>	33M sends/sec
>On the iPad I get
>	28M simple ops/sec
>	0.8M sends/sec
>On my iPhone I get
>	19M simple ops/sec
>	0.4M sends/sec
>Methinks they have some work to do on code generation for the Arm, or else some other optimizations.  I would expect maybe 5x or 10x slower on the iPad, but 30x-40x?  Come on.
>I hope this isn't a conspiracy to ensure that Lively Apps can't compete :-(.
>Let's ask around...  ;-)
>	- Dan

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