On Sun, 2009-05-31 at 13:14 -0700, Curtis Cooley wrote: > On Sun, May 31, 2009 at 12:21 PM, Peter Niederwieser <[email protected]> > wrote: > > I have a HelloSpock project that contains a single Groovy class (a Spock > > specification). What puzzles me a bit is that 'gradle test' takes 10 seconds > > to complete. By comparison, 'ant test' takes 3 seconds, and 'mvn test' 8 > > seconds. This is on repeated invocation, i.e. all downloading and > > compilation has already taken place. Do you consider this acceptable? Would > > the difference be less pronounced for bigger projects? > > I think what you are seeing is the startup cost of Gradle, which in my > observations is higher than Ant's. When you get to 60 second > build/test runs then you should be seeing 53 second ant builds and 60 > second Gradle builds. Whether that is acceptable is up to you.
The problem is that those of use with smaller builds are a bit concerned
with the fact that Gradle is slower than Maven and definitely slower
than Ant.
No matter whether justified or not, whether it can be ameliorated or
not, small builds is where people make comparison judgements, and where
benchmarks are created. There is also a tendency for detractors of a
technology to obsess about performance issues -- witness the arguments
about Groovy itself, and indeed the hassles SCons is getting.
I think there are more important technical evolutions lined up for 0.7,
and I think they should remain the priority. However, I think
performance should be reviewed for 0.8. There was a review previously
and this led to a major rewrite of large tracts of Gradle source from
Groovy to Java, and this successfully slashed run times.
Perhaps a new stage of profiling on a number of projects is in order to
find the "hot spot" and see if there are factors stopping the JIT from
doing its job. Or perhaps the problem is a class written in Groovy that
needs to be rewritten in Java. Alternatively there are just
infelicities in the Java that have not been picked up.
Gradle's performance is in the right scale so I don't think there is a
crisis here, so I don't think there needs to be any deep worrying.
However it would be good to get performance closer to Ant and definitely
better than Maven.
To progress this we need to set up an experiment where as many people as
possible execute their build with profiling so as to provide data. I
can't volunteer to drive this, but if there is anyone out there with
strong profiling experience who can, that would be fantastic.
--
Russel.
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Dr Russel Winder Partner
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Concertant LLP t: +44 20 7585 2200, +44 20 7193 9203
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London SW11 1EN, UK m: +44 7770 465 077 skype: russel_winder
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