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markt pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/tomcat.git
The following commit(s) were added to refs/heads/main by this push:
new 90fcf10974 Change default for archiveIndexStrategy to bloom to improve
performance
90fcf10974 is described below
commit 90fcf10974e0899b42baedf0ac5c4d235252936f
Author: Mark Thomas <ma...@apache.org>
AuthorDate: Tue Jul 22 07:59:11 2025 +0100
Change default for archiveIndexStrategy to bloom to improve performance
This should improve class loading performance for the cost of a small
amount of memory (less than 1kB per JAR file)
---
java/org/apache/catalina/webresources/StandardRoot.java | 2 +-
webapps/docs/changelog.xml | 6 ++++++
webapps/docs/config/resources.xml | 2 +-
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/java/org/apache/catalina/webresources/StandardRoot.java
b/java/org/apache/catalina/webresources/StandardRoot.java
index 5fc8fbb045..1bacb8d3d3 100644
--- a/java/org/apache/catalina/webresources/StandardRoot.java
+++ b/java/org/apache/catalina/webresources/StandardRoot.java
@@ -81,7 +81,7 @@ public class StandardRoot extends LifecycleMBeanBase
implements WebResourceRoot
private boolean trackLockedFiles = false;
private final Set<TrackedWebResource> trackedResources =
ConcurrentHashMap.newKeySet();
- private ArchiveIndexStrategy archiveIndexStrategy =
ArchiveIndexStrategy.SIMPLE;
+ private ArchiveIndexStrategy archiveIndexStrategy =
ArchiveIndexStrategy.BLOOM;
// Constructs to make iteration over all WebResourceSets simpler
private final List<WebResourceSet> mainResources = new ArrayList<>();
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 7133de1da1..1ca1fb7c6a 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -165,6 +165,12 @@
of the request URI presented by the user agent that maps to the context
path. (markt)
</scode>
+ <update>
+ Change the default value of the <code>archiveIndexStrategy</code>
+ attribute of the <code>Resources</code> element from
<code>simple</code>
+ to <code>bloom</code> to improve web application class loading
+ performance. (markt)
+ </update>
<!-- Entries for backport and removal before 12.0.0-M1 below this line
-->
</changelog>
</subsection>
diff --git a/webapps/docs/config/resources.xml
b/webapps/docs/config/resources.xml
index 32027d8b48..de8eb1d9e8 100644
--- a/webapps/docs/config/resources.xml
+++ b/webapps/docs/config/resources.xml
@@ -86,7 +86,7 @@
<p>If this is <code>purged</code> then a bloom filter will be used to
speed up archive lookups, but can be purged at runtime. It is
recommended
to use <code>bloom</code> to avoid reinitializing the bloom
filters.</p>
- <p>If not specified, the default value of <code>simple</code> will be
+ <p>If not specified, the default value of <code>bloom</code> will be
used.</p>
</attribute>
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