[DRILL-3717] Move functions to their own module and preprocess them at build time to speedup startup

• Type: Wish
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: Future
• Component/s: Execution - Codegen
• Assignee: Unassigned
• Reporter: Julien Le Dem
• Created: 27/Aug/15 21:49
• Updated: 01/Oct/15 16:37

Description

all the functions included in the drill distirbution are scanned in the classpath and then parsed with janino at startup.
This slows down startup and unit tests.
If they were in their own module it would be possible to preprocess at build time and have a much better startup time, including in tests.

The classpath scanning library used (reflections) already has a mechanism to persist its result.