[jira] [Assigned] (NIFI-2169) Improve RouteText performance with pre-compilation of RegEx in certain cases

["Marco Gaido (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-2169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marco Gaido reassigned NIFI-2169:
---------------------------------

    Assignee: Marco Gaido  (was: Oleg Zhurakousky)

> Improve RouteText performance with pre-compilation of RegEx in certain cases
> ----------------------------------------------------------------------------
>
>                 Key: NIFI-2169
>                 URL: https://issues.apache.org/jira/browse/NIFI-2169
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>    Affects Versions: 0.6.1
>            Reporter: Stephane Maarek
>            Assignee: Marco Gaido
>            Priority: Major
>              Labels: beginner, easy
>             Fix For: 1.5.0
>
>
> When using RegEx matches for the RouteText processor (and possibly other processors), the RegEx gets recompiled every time the processor works. The RegEx could be precompiled / cached under certain conditions, in order to improve the performance of the processor
> See email from Mark Payne:
> Re #2: The regular expression is compiled every time. This is done, though, because the Regex allows the Expression
> Language to be used, so the Regex could actually be different for each FlowFile. That being said, it could certainly be
> improved by either (a) pre-compiling in the case that no Expression Language is used and/or (b) cache up to say 10
> Regex'es once they are compiled. 



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