[PERF] Avoid unnecessary AbstractList$Itr instances
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Key: MYFACES-3130
URL: https://issues.apache.org/jira/browse/MYFACES-3130
Project: MyFaces Core
Issue Type: Improvement
Components: JSR-314
Environment: myfaces core trunk
Reporter: Martin Kočí
Priority: Minor
Similar issue: MYFACES-3129
loop from java 5:
for (Object object: objects)
creates new instance of AbstractList$Itr, if objects are instance of ArrayList.
Similar situation is with explicit .iterator() call.
In my testcases, it is about ~ 100 000 instances per request/response. Creation
itself is cheap, but triggers GC lately.
I suggest to use old index-style for (i = 0; i < childCount; i++) if
possible. Are there any rawbacks of index-based iteration?
Children is List and as implementation detail we know that it is instance of
ArrayList.
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