Re: [Simple-support] Android performance - strange profiling

[Dawid W. <daw...@gm...>]

This is not only the case with Android I think. We compile simple-xml
to .NET via IKVM and the startup time lag is significant too. I think
it's the sheer amount of classes involved is the problem (initial
JITting).

I would appreciate if you could share your findings and I would be
interested in helping to improve it if possible.

Dawid

On Tue, Jan 10, 2012 at 2:00 PM, Robert Massaioli
<rob...@gm...> wrote:
> I just started doing timing tests on my XML and I discovered that on an ASUS
> Transformer (Original) that a 31 line XML file took 2 seconds to load and a
> 219 line xml file took around 2.8 seconds to load. Those times are quite
> large, it is obviously preferably if we could cut them by about a fifth. I
> suspect that the massive amounts of branching contribute to the delay
> somewhat but more investigation needs to be done. Niall probably also knows
> what the cause of the problems are.
>
> I will be looking into it soon. I my goal would be to get the entire process
> down to 0.5 seconds on an Android device for any file that has 1000 lines or
> less. Maybe the reflection code also causes quite a bit of a slowdown. We
> shall see. I wonder how much of the reflection calls get cached as the
> parsing goes along.
>
> Robert
>
> On Tue, Jan 10, 2012 at 5:00 AM, Rangel Reale <ran...@gm...> wrote:
>>
>> Hello,
>>
>> I am having performance issues in Android parsing a very large XML file.
>>
>> Profiling trying to find where the bottleneck is, if I undestood
>> correctly, the application is 44% of the time in the function
>> "KXmlParser.getLineNumber", called from PullReader$Start.<init>, but looking
>> at its source code it seems to only read an instance variable an nothing
>> more.
>>
>> Can someone shed a light on this?
>>
>> I don't know it posting images is allowed here, so I uplodaded to an image
>> sharing site:
>>
>> http://imgur.com/C5ocm
>>
>> Thanks,
>> Rangel
>>
>>
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