[PROTON-1274] Performance: avoid referencing 'context' in Event constructor

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: proton-0.13.0
• Fix Version/s: proton-0.15.0
• Component/s: python-binding
• Assignee: Ken Giusti
• Reporter: Ken Giusti
• Created: 05/Aug/16 19:33
• Updated: 08/Feb/17 19:06
• Resolved: 10/Aug/16 17:34

Description

Each time an Event object is instantiated its context is checked to determine if the Event is user-defined rather than a native Proton event.

Referencing the context is expensive - it causes a temp wrapped object to be created then disposed. This can be avoided by checking if the event's class is PN_PYREF, which it will always be for user-defined events.