ILDJIT: A parallel, free software and highly flexible Dy- namic Compiler

ILDJIT, a new-generation dynamic compiler and virtual machine designed to support parallel compilation, is here introduced. Our dynamic compiler is a free software released through the GNU General Public License (version 2) and it targets the increasingly popular ECMA-335 specification. The goal of this project is twofold: on one hand, it aims at exploiting the parallelism exposed by multi-core architectures to hide dynamic compilation latencies by pipelining compilation and execution tasks; on the other hand, it provides a flexible, modular and adaptive framework for dynamic code optimization. Thanks to the compilation latency masking effect of the pipeline organization, our dynamic compiler is able to mask most of the compilation delay, when the underlying hardware exposes sufficient parallelism. Even when running on a single core, the ILDJIT adaptive optimization framework manages to speed up the computation with respect to other open source implementations of ECMA-335.