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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7115) Speed up FieldCache.CacheEntry toString by setting initial StringBuilder capacity
Date Mon, 21 Mar 2016 18:54:25 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15204896#comment-15204896
] 

ASF subversion and git services commented on LUCENE-7115:
---------------------------------------------------------

Commit 0926cecae647862760068d5eb0c8e8bc5afc6a79 in lucene-solr's branch refs/heads/branch_6x
from [~gchanan]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=0926cec ]

LUCENE-7115: Speed up FieldCache.CacheEntry toString by setting initial StringBuilder capacity


> Speed up FieldCache.CacheEntry toString by setting initial StringBuilder capacity
> ---------------------------------------------------------------------------------
>
>                 Key: LUCENE-7115
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7115
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>            Reporter: Gregory Chanan
>            Assignee: Gregory Chanan
>         Attachments: LUCENE-7115.patch
>
>
> Solr can end up printing a lot of these objects via the JmxMonitoriedMap, see SOLR-8869
and SOLR-6747 as examples.
> From looking at some profiles, a lot of time and memory are spent resizing the StringBuilder,
which doesn't set the initial capacity.
> On my cluster, the strings are a bit over 200 chars; I set the initial capacity to 250
and ran tests calling toString 1000 times.  Tests consistently show 10-15% improvement when
setting the initial capacity.



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