Hi There is a patch proposed (after many months thinking about it), according to the discussion on:
http://markmail.org/message/kca64ojdvb6em367?q=%5Bcore%5D+performance:+TagAttributeImpl+part+II:+object+allocations here: https://issues.apache.org/jira/browse/MYFACES-3160 The idea is cache ValueExpressions when necessary to reduce unnecessary object allocations and increase speed, because EL parsing is also avoided when necessary. I think it is a nice optimization. The idea is detect when the VariableMapper has a value and if so, do not cache any expression. Additionally, use a volatile variable to store expressions. The patch adds a new web config param called org.apache.myfaces.CACHE_EL_EXPRESSIONS to enable/disable this feature. @Martin Koci: since you was the one proposing this optimization, it could be good if you can check if it is worth or not (I'm 99% sure, so any help to reach 100% is welcome!) . If that so, I'll commit the proposed code. regards, Leonardo Uribe
