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

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

Thanks for clarification, bubbleguuum.

Is there a way to build it in advance or not build the schema then? We
have one-time configuration loading code so any caching is not going
to make any difference.

I also experimented with pull parser replacement and it did provide
some speedup, but it was a fraction of the total first-parse
initialization cost under .NET.

Dawid


On Tue, Jan 10, 2012 at 5:20 PM, bubbleguuum <bub...@fr...> wrote:
> On 10/01/2012 17:11, Dawid Weiss wrote:
>>
>> 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
>>
>
> First parsing is slow as a model of the schema is constructed (and cached).
> Subsequent parse should be much faster.
>
> However I have recently converted a simple-xml parser to straight
> XmlPullParser and it was 3-5x faster.
> Notably, direct XmlPullParser allocates way less temp objects which in turn
> lessen garbage collection a lot.
>
> At this point, I wouldn't use simple-xml on Android when parsing performance
> is important or critical.
>