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From "Jason Cote (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MASSEMBLY-875) Maven 3.x is about 10x slower than 2.6
Date Wed, 07 Mar 2018 22:14:00 GMT

    [ https://issues.apache.org/jira/browse/MASSEMBLY-875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16390327#comment-16390327
] 

Jason Cote commented on MASSEMBLY-875:
--------------------------------------

I am noticing the same poor assembly performance in one of my projects after adding a certain
dependency (Bouncycastle in this case):
{code:xml}
<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.59</version>
</dependency>
{code}

Now when doing a {{mvn package}} to build a fat jar using maven-assembly-plugin 3.1.0, the
process takes 2+ minutes.

If downgrade to version 2.6 it only take ~12 seconds.  Alternatively changing to use the maven-shade-plugin
instead can also produce the jar for me in ~10 seconds.

I can work on putting together a public repo to reproduce if needed.

> Maven 3.x is about 10x slower than 2.6
> --------------------------------------
>
>                 Key: MASSEMBLY-875
>                 URL: https://issues.apache.org/jira/browse/MASSEMBLY-875
>             Project: Maven Assembly Plugin
>          Issue Type: Bug
>            Reporter: Stu
>            Priority: Minor
>
> In all our java projects, we have a fairly basic assembly configuration, something like
this:
> {code:java}
> <plugin>
>     <artifactId>maven-assembly-plugin</artifactId>
>     <version>2.6</version>
>     <configuration>
>         <archive>
>             <manifest>
>                 <mainClass>org.x.x.x</mainClass>
>             </manifest>
>         </archive>
>         <descriptorRefs>
>             <descriptorRef>jar-with-dependencies</descriptorRef>
>         </descriptorRefs>
>     </configuration>
>     <executions>
>         <execution>
>             <id>make-assembly</id>
>             <phase>package</phase>
>             <goals>
>                 <goal>single</goal>
>             </goals>
>         </execution>
>     </executions>
> </plugin>{code}
> They all take about 10x longer with any 3.x.x version of the maven assembly plugin than
the 2.6 version.
> This has been noticed by others:
> [https://stackoverflow.com/questions/9009232/what-sort-of-configuration-issues-or-problems-might-make-maven-assembly-plugin-g/24519615#24519615]
> But not reported as a bug that I could find.
> Although I could only justify "Minor" for the priority, this is really is a blocker for
us moving to 3.x.x
> The upgrade is just not worth taking your build from < 10 sec to > 50 sec.
> (For this particular build, it went from about ~ 7 sec to ~ 57 sec.)



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