[DRILL-1774] Improve JSON Performance

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Component/s: Storage - JSON
• Assignee: Jacques Nadeau
• Reporter: Jacques Nadeau
• Created: 24/Nov/14 05:36
• Updated: 01/Dec/14 18:12
• Resolved: 01/Dec/14 05:46

Description

There are multiple reasons that JSON performance is subpar. We need to update the reader to do the following:

• Avoid double reading (for rewinding)
• Take advantage of Jackson interning/hashing of field names.
• Improve field selection behavior. (avoid object creation and multiple traversals)
• Better delineation of allTextMode behavior

Issue Links

• is related to: DRILL-1789 Add projection evaluation and filter pushdown for JSON reader