[jboss-dev] xb in start up time

[Alexey Loubyansky]

That's for sure. It's actually needed everywhere in XB. So, there could 
be several starting points.

Anil Saldhana wrote:
> Hi Alexey,
>   thanks for looking into this.  The unmarshalling phase is probably 
> going to be where optimization may be needed.
> 
> Cheers.
> 
> Alexey Loubyansky wrote:
>> To get an idea of what's taking time in XB during the AS start-up, I 
>> added simple time checks for three things:
>> - creation of unmarshaller instances (parsers)
>> - schema binding (parsing of JBossXB/JAXB annotations)
>> - unmarshalling (parsing xml + assembling the Java graph)
>>
>> I started the default AS configuration 10 times and here are the average 
>> results.
>>
>> AS start-up time: 31226 ms
>> Init unmarshallers (94 instances): 99 ms
>> Binding (13 schemas): 1194 ms
>> Unmarshalling (71 files): 1764 ms
>>
>> Total xb time: 3057 ms
>> Which is around 10%.
>>
>> I think first, I'm going to look into serializing/precompiling bindings, 
>> e.g. metadata projects could already include in the releases serialized 
>> schema bindings.
> 
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