> Groovy's dynamic compilation is reliable, but sloooooooooow. I guess you mean execution speed, not compilation? Compilation is fast enough I think. Execution

> Groovy's dynamic compilation is reliable, but sloooooooooow. I guess you mean execution speed, not compilation? Compilation is fast enough I think. Execution certainly compares fine with other dynamic languages, at least, in my usage (and for some things it is much faster). > The static compilation added in Groovy 2 is much faster but still buggy The bug you mention is certainly bad, but it was addressed extremely quickly. Are there other examples? > It was written by one developer, and first shipped in Grails only 2 months ago A little misleading - static compilation has been in core Groovy for 9 months or so and is now supported by the core groovy team. > And does Grails actually use any of Groovy's static compilation features? I don't know, but it's not really relevant. I'm not advocating for Grails here, I'm advocating use of Groovy with Play. Part of the reason I want that is that I'm not extremely fond of Grails for various reasons.