问题
I see that the recent release of Groovy 2.0 includes optional static compilation along with several other added benefits, like optional static type checking. After doing a bit of a search, I haven't been able to find any extensive benchmarks comparing Groovy's performance (with static compilation) to Java and perhaps Scala. Does anyone know of any such performance comparisons? Can we assume that it is the same as Groovy++ was before it died? If it's performance is comparable, would Groovy be a viable alternative for a large, performance-critical application?
回答1:
There are some benchmarks here (though it's hard to see what's going on)
However, taking the Groovy 1.8.2 Fib source code from the bottom of the page, and running it in groovy 2.0 gives you:
Groovy(static ternary): 1623ms
Groovy(static if): 1583ms
Groovy(instance ternary): 1744ms
Groovy(instance if): 1694ms
Putting @groovy.transform.CompileStatic at the top of the script gives you:
Groovy(static ternary): 819ms
Groovy(static if): 799ms
Groovy(instance ternary): 816ms
Groovy(instance if): 811ms
Obviously, this is not a complete benchmark (it's only testing one thing), it doesn't include warmup or anything, and Groovy 2.0 has only been out a week, however it does hint towards a good speed improvement in this situation...
回答2:
I believe java runs those tests in around 550ms
I did some performance comparison with Java. For "static ternary" and "static if" performance of Groovy with @CompileStatic is somewhat the same as with Java. For "instance ternary" and "instance if" it's almost a factor of 2. See my blog post.
来源：https://stackoverflow.com/questions/11344412/what-is-the-performance-of-groovy-2-0-with-static-compilation