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+---
+layout: post
+title: Released Cyclone Scheme 0.5.4
+excerpt: This release allows `icyc` to specify additional library import directories and also includes minor performance improvements.
+---
+
+Features
+
+- Allow the `-A` and `-I` options to `icyc` for specifying additional library import directories.
+- Perform constant folding as part of the CPS optimization phase.
+- Statically allocate closures that do not contain any free variables, to avoid unnecessary heap allocations.
+
+Bug Fixes
+
+- Updated `string->number` to return `#f` for all bases when the conversion fails. Previously bases other than ten would return `0` instead.