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.
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