Program 5x slower as a .jar file than when ran in eclipse

Question

Currently the speed to run a test function is about 5× slower when done with the jar file vs. doing it in Eclipse. How should I install the jar file so the speed is similar?

I am using maven. I am using outside dependencies. I just need to know what is the best code for the build (in the pom file) to make it run as fast as possible, with no concern for copy rights. The only thing I need is for the program to work on a machine without maven installed.

Also, based on the last time I asked this, I will add more info that might be useful. Java is up to date. All is stored on the C drive. There is no outputs that is slowing this down, and it is all text based. There is a lot of reading and writing on files going on that take time to do, but it took 16.6 seconds using Eclipse and 89.6 using the jar file.

Here is the pom file, including the dependencies:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>kov</groupId>
  <artifactId>etf-creator</artifactId>
  <version>1.0-SNAPSHOT</version>

<dependencies>

<!-- to get html request for api -->
<dependency>
     <groupId>com.mashape.unirest</groupId>
     <artifactId>unirest-java</artifactId>
     <version>1.4.9</version>
</dependency>

<!-- for a fast way to read in a file -->
<!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.6</version>
</dependency>

</dependencies>


<build>
  <plugins>

    <plugin>
    <!-- https://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven -->
  <artifactId>maven-assembly-plugin</artifactId>
  <configuration>
    <archive>
      <manifest>
        <mainClass>Driver</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>


  </plugins>
</build>

</project>

Also, for someone reason it will not install when it was before. I get an error "Source option 5 is no longer supported. Use 7 or later."

I am new to Eclipse and making executable jar files on Eclipse, so I appreciate the help.

You are probably looking at the wrong place. It is unlikely that Eclipse or Maven have anything to do with your speed problems. — J Fabian Meier, May 17 '20 at 06:57
Then why is it fast in eclipse and slow as a jar? I am using the same machine for tests. @JF Meier — mixmasterdj, May 17 '20 at 16:44
I don't know, but I guess you changed something else by accident, like different data. — J Fabian Meier, May 17 '20 at 16:53
No. It is definitely not different data. I can share my code for anyone who would like to really get into it. @JF Meier — mixmasterdj, May 17 '20 at 21:06

score 1 · Answer 1 · answered May 18 '20 at 15:46

1

I figured it out. I needed more memory when running it. I ran it with this and works faster now:

java -Xms512m -Xmx1024m -jar mainProgram.jar

answered May 18 '20 at 15:46

mixmasterdj

11
3

Program 5x slower as a .jar file than when ran in eclipse

1 Answers1