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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

2.1.0 - 2026-01-07

  • Bump minimum Ruby version to 3.2
  • Add comprehensive tests for QR code boundaries and encoding
  • Performance optimisations: 80-90% faster QR code generation across all sizes
    • Optimised demerit calculation functions (demerit_points_1_same_color, demerit_points_2_full_blocks, demerit_points_3_dangerous_patterns)
    • Eliminated nested Range objects and redundant array lookups in hot paths
    • Pre-computed frequently accessed values to reduce calculation overhead
    • Large QR codes (v20) now generate in ~85ms vs ~154ms previously
  • Memory optimisation: 70-76% reduction when using RQRCODE_CORE_ARCH_BITS=32
    • Single large QR (v24): 8.53 MB → 2.92 MB
    • Batch generation (100x v1): 37.91 MB → 9.10 MB
    • Also provides 2-4% speed improvement due to better cache locality
  • Add comprehensive benchmarking infrastructure with memory and performance profiling tools

2.0.1 - 2025-11-25

  • Update required_ruby_version to support >= rather than ~> ready for Ruby 4

2.0.0 - 2025-04-24

  • Various README updates
  • Fix for issue #43
  • Fix for issue #42
  • Drop Ruby < 3 to keep up with dependency updates
  • Add option to use ENV RQRCODE_CORE_ARCH_BITS to override the bits value (32 or 64) used during the encoding process. This has been shown to greatly reduce the memory usage but I can't prove it doesn't break anything for all people. Use at your own risk.
  • Fixed the 'Do Your Own Rendering' example code to reflect the current interface.

1.2.0 - 2021-08-26

  • Added Multi Mode Support which allows for multi-segment encoding. Thanks to @ssayer

1.1.0 - 2021-07-01

  • Add a basic benchmark file
  • Add standardRB badge
  • Add .freeze on CONST lookup objects
  • Remove unused @mode instance variable
  • A batch of small refactors and optimizations

1.0.0 - 2021-04-23

Changed

  • README updated
  • Small documentation clarification @smnscp.
  • Rakefile cleaned up. You can now just run rake which will run specs and fix linting using standardrb

Breaking Changes

  • Very niche but a breaking change never the less. The to_s method no longer accepts the :true and :false arguments, but prefers :dark and :light.

0.2.0 - 2020-12-26

Changed

  • fix required_ruby_version for Ruby 3 support
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