Leonardo Uribe created MYFACES-3572:
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Summary: [perf] remember initial state for properties changed in
normal JSF lifecycle
Key: MYFACES-3572
URL: https://issues.apache.org/jira/browse/MYFACES-3572
Project: MyFaces Core
Issue Type: Improvement
Components: JSR-314
Reporter: Leonardo Uribe
Assignee: Leonardo Uribe
There are 4 component properties that are very special in JSF:
value
localValueSet
valid
submittedValue
These ones are used intensively over JSF lifecycle. By performance reasons, PSS
algorithm does not save the initial state of a component and instead, just mark
the properties that were changed from its initial state and save them in the
delta state. This reduce the required memory for a component and also reduce
the necessary calculations to derive the delta.
But since these 4 properties are used intensively, it is worth to calculate the
initial state and store it into the StateHelper. Later, we can use that
information in StateHelper.saveState(), to remove from delta the values that
are not necessary to save, because are the same ones from the initial state. We
only need to add some lines into UIInput.markInitialState(), which is
reasonable.
The result of this change is an important reduction over state size generated
by input components. If validation is successful, the input component will not
generate state, and if the validation fails, only the components with some
value to save will store something into the state.
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