[jboss-dev] xb in start up time

[Alexey Loubyansky]

Deserializing SchemaBinding's from files with standard Java 
serialization appears to be around 6.5 times slower than building them 
from annotations.

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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