[UIMA-2385] Improve XmiCasDeserializer performance

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0SDK
• Fix Version/s: 2.4.1SDK
• Component/s: Core Java Framework
• Assignee: Marshall Schor
• Reporter: Adam P. Lally
• Created: 06/Apr/12 21:55
• Updated: 09/Mar/15 15:38
• Resolved: 30/May/12 15:08

Description

I profiled an expensive CAS deserialization and found that 46% of the time was in CASImpl.ll_getFSForRef (the method that creates a FeatureStructure Java object for a CAS FS). All those calls were coming from deserializing arrays (of which this particular CAS has many).

It is unnecessary to create FeatureStructure Java objects here. For non-array FSs, XmiCasDeserializer uses low-level CAS APIs in order to avoid this overhead. But for arrays, it currently does not use the low-level APIs.

Issue Links

• relates to: UIMA-4279 tune space-time tradeoffs for internal array structures in core uima