[SYSTEMDS-1791] Performance features frame blocks

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Done
• Fix Version/s: SystemML 0.15
• Assignee: Matthias Boehm
• Reporter: Matthias Boehm
• Created: 20/Jul/17 05:43
• Updated: 09/Sep/17 02:21
• Resolved: 21/Jul/17 00:12

Description

Recent experiments have shown that there are unnecessary overheads in various frame block operations. This task is an umbrella for all related performance improvements. In detail, this includes:

• Shallow copy for column indexing
• Bidirectional reuse of recode maps in meta data frames
• Avoid unnecessary long-string-double parsing on transformapply