[
https://issues.apache.org/jira/browse/NIFI-2169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16292753#comment-16292753
]
ASF GitHub Bot commented on NIFI-2169:
--------------------------------------
Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2343#discussion_r157241548
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/RouteText.java
---
@@ -209,6 +215,30 @@
private volatile Map<Relationship, PropertyValue> propertyMap = new
HashMap<>();
private volatile Pattern groupingRegex = null;
+ @VisibleForTesting
+ final static int PATTERNS_CACHE_MAXIMUM_ENTRIES = 10;
+
+ /**
+ * LRU cache for the compiled patterns. The size of the cache is
determined by the value of
+ * {@link #PATTERNS_CACHE_MAXIMUM_ENTRIES}.
+ */
+ @VisibleForTesting
+ final ConcurrentMap<Pair<Boolean, String>, Pattern> patternsCache =
CacheBuilder.newBuilder()
--- End diff --
yes, this was my other option. I will do this, thanks.
> 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: Oleg Zhurakousky
> Labels: beginner, easy
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
