[CALCITE-1093] Smarter use of List construction

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: avatica-1.7.0
• Component/s: avatica
• Assignee: Josh Elser
• Reporter: Josh Elser
• Created: 17/Feb/16 20:59
• Updated: 14/Mar/16 15:07
• Resolved: 03/Mar/16 17:33

Description

Through profiling the Avatica server, I noticed that we were spending some time resizing an ArrayList while converting MetaResultSet's to ResultSetResponse's. This was because we did not specify the capacity of the ArrayList<ResultSetResponse> during construction despite knowing what the capacity needed to be.

We can avoid some costly array copies if we specify the capacity in the constructor.