[MAHOUT-921] FPG uses a lot of boxed primitives - this patch eliminates a bunch of List<Integer>

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.6
• Fix Version/s: 0.6
• Assignee: Robin Anil
• Reporter: Tom Pierce
• Created: 11/Dec/11 19:59
• Updated: 31/Mar/15 22:49
• Resolved: 15/Jan/12 16:19

Description

TransactionTree uses List<Integer> internally and as part of its API; this patch changes that and pushes the use of List<Integer> down to FPGrowth.java. This can be converted if the perf bug can be fixed (MAHOUT-890). I will also provide an alternate base FPGrowth implementation.

Please note that this patch assumes the patch attached to MAHOUT-920 has already been applied.

Issue Links

• is related to: MAHOUT-920 Remove a mapreduce job from parallel FPGrowth workflow
• relates to: MAHOUT-927 FPG saves a mapping from from feature to mining group, when this can be calculated on the fly