cyclone/_posts/2018-05-07-Released-Cyclone-Scheme-0.7.3.md

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post	Released Cyclone Scheme 0.7.3	This release includes many bug fixes as well as performance enhancements for hash tables.

Features

• Made several performance improvements to SRFI 69 hash tables, including:
  • Massively improved lookup performance for symbols.
  • Increased the max bound of hash tables to (2 ^ 30) - 1.
  • Changed hash-by-identity to a high-performance builtin.
• Added a repl function to (scheme repl) to make it easy to use a REPL from your own code.
• Added basic support for square and curly brackets in place of parentheses.

Bug Fixes

• Fixed an off-by-one error in read-line where the function erroneously reported an extra character was read from stdin. Thanks to wasamasa for the bug report.
• Fixed a CPS optimization issue where multiple copies of the same lambda are introduced during beta expansion, which causes the optimizer to potentially pick up the wrong value when optimizing-out function calls later on. Thanks to @Chant on Github for providing the report and a test program demonstrating the issue.
• Updated the parser to recognize mnemonic escapes (EG: \n, \a, etc) and inline hex escapes as part of a symbol.