Dejan Stojadinović created RAT-575:
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Summary: [Regression] Slower RAT task execution with recent
versions (0.17 and 0.18)
Key: RAT-575
URL: https://issues.apache.org/jira/browse/RAT-575
Project: Apache RAT
Issue Type: Task
Components: core engine
Affects Versions: 0.18, 0.17
Environment: *Environment:*
* Gradle RAT plugin versions / RAT versions:
** plugin version 0.8.1 / RAT version 0.15 (baseline, i.e. Kafka trunk)
** plugin version 0.10.0 / RAT version 0.17
** plugin version 0.11.0 / RAT version 0.18
* Gradle (wrapper) version: 9.7.1
* JDK: 25.0.4
{code:java}
openjdk version "25.0.4" 2026-07-21 LTS
OpenJDK Runtime Environment Temurin-25.0.4+7 (build 25.0.4+7-LTS)
OpenJDK 64-Bit Server VM Temurin-25.0.4+7 (build 25.0.4+7-LTS, mixed mode,
sharing)
{code}
* POC: [https://github.com/apache/kafka/pull/23424]
{code:java}
dejan@home:~/kafka$ git log -3 --oneline
2575547fcff (HEAD -> KAFKA-21064, origin/KAFKA-21064) KAFKA-21064 plugin
version bumped to 0.11.0 (in order to use Apache RAT bundled version 0.18)
6b28f8c39d6 KAFKA-21064 Apache RAT Gradle plugin version upgrade: 0.8.1 -->
0.10.0; redundant custom style file is removed
7a09196f933 KAFKA-20745: extend OffsetMapTest to verify different hash
algorithms (#23391)
dejan@home:~/kafka$
{code}
*Test scenario:* execute: *./gradlew rat --rerun --profile* three times (once
per each commit mentioned above).
*Test results:*
|commit|gradle RAT plugin/RAT version|RAT task execution time|
|Kafka trunk|plugin 0.8.1 (RAT 0.15)|2.553s|
|PR 1st commit|plugin 0.10.0 (RAT 0.17)|50.816s|
|PR 2nd commit|plugin 0.11.0 (RAT 0.18)|26.125s|
Reporter: Dejan Stojadinović
*Problem description:*
# it started after attempted version upgrade from *RAFT 0.15 to 0.17* (via
Gradle Rat plugin version upgrade here:
[https://github.com/apache/kafka/pull/23424#issuecomment-5633077550):] RAT task
execution time was increased exponentially (25 times)
# plugin developer Paul Merlin (aka [~eskatos]) was extra responsive:
[https://github.com/eskatos/creadur-rat-gradle/issues/37#issuecomment-5630452783]
# RAT 0.18 task execution time is better comparing to 0.17 (but nowhere near
to 0.15)
(on) Note: I can provide Gradle Develocity build results scans.
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