On May 28, 2008, at 3:10 PM, Hans Dockter wrote:
On May 28, 2008, at 1:06 PM, Ittay Dror wrote:
hdockter wrote:
time groovy HelloGroovy.groovy
(My machine: 1.1 seconds)
time java -cp .:path_to_groovy-all_jar HelloGroovy
(My machine: 0.35 seconds)
time java HelloJava
(My machine: 0.1 seconds)
(note: using 'groovy' means running /usr/bin/groovy which is an
ubuntu
package of groovy 1.5.4)
/tmp/perf > time groovy HelloGroovy.groovy
hello
real 0m1.034s
user 0m1.184s
sys 0m0.084s
/tmp/perf > time java -cp
.:/work/research/gradle-0.1.4/lib/groovy-all-1.5.5.jar HelloGroovy
hello
real 0m0.788s
user 0m0.640s
sys 0m0.028s
/tmp/perf > time java HelloJava
Hello
real 0m0.150s
user 0m0.088s
sys 0m0.028s
So it looks like using the groovy jar in gradle is what is causing
the
slowdown. When running the 'groovy' command (first test), this is
what it
does:
exec /usr/lib/jvm/java-6-sun-1.6.0.06/bin/java -classpath
/usr/share/groovy/lib/groovy-1.5.4.jar -Dscript.name=/usr/bin/groovy
-Dprogram.name=groovy
-Dgroovy.starter.conf=/usr/share/groovy/conf/groovy-starter.conf
-Dgroovy.home=/usr/share/groovy
-Dtools.jar=/usr/lib/jvm/java-6-sun-1.6.0.06/lib/tools.jar
org.codehaus.groovy.tools.GroovyStarter --main
groovy.ui.GroovyMain --conf
/usr/share/groovy/conf/groovy-starter.conf --classpath .
HelloGroovy.groovy
In the first example we have groovy startup-time plus compile time,
in the second only startup-time. The Groovy startup-time is
significant as a lot of classloading is happening. As a side note:
The JRuby startup time is a couple of seconds, although they have
found a way to improve this in there next release. It is
interesting that the startup time is twice as long on your machine,
although you have a faster processor. Yet this is still not the
complete story of the slow performance of your gradle build. What I
want to do tomorrow, is to upload a snapshot version of Gradle
which prints timing information when started in debug mode. That
way we should learn about the other bottlenecks. I will ping you
when I've uploaded the new snapshot version.
I haven't produced the new snapshot yet. I'm out of office until
Sunday, so it will be hopefully Monday.
- Hans
- Hans
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Hans Dockter
Gradle Project lead
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