Released Cyclone Scheme 0.9.4

November 25th, 2018

Compiler Optimizations

Optimize recursive functions by expressing the recursive calls using C iteration. This optimization is more effective when combined with the others listed below as they collectively increase the chances that a higher-level Scheme loop may be compiled down to a single C function. These C functions can then be “called” repeatedly using a while loop which is more efficient at a low level than repeated function calls.
Combine lambda functions that are only called for side effects.
Improve inlining of primitives that work with immutable objects.
Eliminate functions that are only used to define local variables.

Features

Added a new feature program to cond-expand that is only defined when compiling a program. This allows, for example, a .scm file to contain a section of code that can be used to run unit tests when the file is compiled as a program. The same file can then be used in production to import code into a library. This is similar to using the __main__ scope in a python program.

Bug Fixes