Michael Braun created SOLR-11242:
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Summary: QueryParser should avoid creating an
LookaheadSuccess(Error) object with every instance
Key: SOLR-11242
URL: https://issues.apache.org/jira/browse/SOLR-11242
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 7.0, 6.6.1, master (8.0)
Reporter: Michael Braun
Sampling of an application which includes a very heavy query load testing
against an EmbeddedSolrServer reveals a huge amount of the time spent on
initialization of the QueryParser itself, specifically an internal class called
LookaheadSuccess which extends from Error. With every instance of QueryParser
created, it spends time populating the stacktrace for this object, which is
created as a final instance variable.
Ideally an exception shouldn't be used as a signaling mechanism, or at the very
least, not an exception created on every single object instantiation.
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