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Justin Ethier 2018-11-23 23:35:52 -05:00
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CHANGELOG.md
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Compiler Optimizations Compiler Optimizations
- Optimize recursive functions by expressing the recursive calls using C iteration. This optimization is more effective when combined with the other functions listed below as those increase the chances that a loop may be compiled down to a single function which can then be "called" repeatedly using a `while` loop which is more efficient at a low level than repeated calls to C functions. - 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 which can then be "called" repeatedly using a `while` loop which is more efficient at a low level than repeated calls to C functions.
- Combine lambda functions that are only called for side effects. - Combine lambda functions that are only called for side effects.
- Improve inlining of primitives that work with immutable objects. - Improve inlining of primitives that work with immutable objects.
- Eliminate functions that are only used to define local variables. - Eliminate functions that are only used to define local variables.
Features 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. Or the same file can be used to import code into a library. This is similar to using the `__main__` scope in a python program. - 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 Bug Fixes