Syrux 095d1cb3aa [SPARK-20265][MLLIB] Improve Prefix'span pre-processing efficiency ... ## What changes were proposed in this pull request? Improve PrefixSpan pre-processing efficency by preventing sequences of zero in the cleaned database. The efficiency gain is reflected in the following graph : https://postimg.org/image/9x6ireuvn/ ## How was this patch tested? Using MLlib's PrefixSpan existing tests and tests of my own on the 8 datasets shown in the graph. All result obtained were stricly the same as the original implementation (without this change). dev/run-tests was also runned, no error were found. Author : Cyril de Vogelaere <cyril.devogelaeregmail.com> Author: Syrux <pokcyril@hotmail.com> Closes #17575 from Syrux/SPARK-20265.		2017-04-13 09:44:33 +01:00
..
src	[SPARK-20265][MLLIB] Improve Prefix'span pre-processing efficiency	2017-04-13 09:44:33 +01:00
pom.xml	[SPARK-17807][CORE] split test-tags into test-JAR	2016-12-21 16:37:20 -08:00