Ikarus is the first public implementation of a large part of the R6RS Scheme standard.

Some of the ideas behind the design of Ikarus Scheme are detailed in "An Incremental Approach to Compiler Construction" by the developer.

[3] Ikarus is self-hosting with most of the compiler and primitives written in Scheme and only a few parts of the runtime system written in C. Also, rather than using an external intermediate language like C, LLVM, or C--, it compiles directly to machine code to better exploit the underlying machine architecture.

Ikarus uses the portable R6RS library and syntax-case system which is also developed by Abdulaziz Ghuloum and is described in a paper, "Implicit phasing for R6RS libraries".

[5] Ikarus runs on x86 but requires SSE2 support to handle floating-point arithmetic (FP) computations so it will not produce code for Intel chips earlier than Pentium 4 or for Advanced Micro Devices (AMD) chips before Athlon 64.