[UIMA-500] Reduce excessive synch lock contention caused by calls to ll_isValidTypeCode that are not needed

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1
• Fix Version/s: 2.2
• Assignee: Marshall Schor
• Reporter: Marshall Schor
• Created: 13/Jul/07 17:07
• Updated: 16/Jul/07 03:12
• Resolved: 16/Jul/07 03:12

Description

User reports slowdown as the number of threads are increased; traced to lock contention in Vector.get() method; call trace is:
XmiCasSerializer$XmiCasDocSerializer.<many places>
CASImpl.ll_getTypeClass(int)
TypeSystemImpl.subsumes(int, int)
TypeSystemImpl.ll_subsumes(int, int)
TypeSystemImpl.ll_isArrayType(int)
TypeSystemImpl.ll_isValidTypeCode(int) <<< Not needed
SymbolTable.getSymbol(int)
Vector.get(int)

The callers of ll_isValidTypeCode include this caller and another (ll_getStringSet), where the call can be omitted without affecting the returned value.