Dynamic-mode Groovy is as slow as other dynamic languages. The recently added static-compilation mode for Groovy still regularly spews up bugs, perhaps because

Dynamic-mode Groovy is as slow as other dynamic languages. The recently added static-compilation mode for Groovy still regularly spews up bugs, perhaps because it was written by a single programmer with little beta testing whereas Scala and Java have many high-pedigree developers behind them, and heaps of documentation and testing.