(PSI) A portable scheme interpreter by Ozan Yigit

[email protected], David Keldsen and Pontus Hedman that

includes a simple DAG compiler and a virtual machine. It

can be used as an integrated extension interpreter in other

systems and allows easy addition of new primitives. There are

some unique debugging and tracing facilities. Acceptable

performance results from a fairly straight-forward

implementation. Continuations are fully and portably

supported and perform well. PSI is based on the simple

compilers and virtual machine in Kent Dbyvig's thesis.