Ruby Core Updates

Daily updates from the Ruby programming language core. Track the evolution of Ruby with insights into new features, optimizations, and language improvements.

About this developer podcast

Ruby Core Updates turns GitHub activity into short audio updates.

Episodes cover commits, pull requests, issues, and release work.

Use this page to listen, subscribe, and find related developer podcasts.

This show page is the public hub for the podcast. It has one stable listen URL.

Use it to find RSS feeds, recent episodes, related shows, and older episode links.

If the project is quiet, new episodes may pause until there is useful activity to summarize.

Recent episodes from Ruby Core Updates

  1. Weekly Recap - Length Types, Windows Y-JIT, and Built-in Prism

    Ruby core pushed large-object readiness with a new length type across core, default gems and JIT compilers, alongside first Y-JIT support on Windows. The week also folded Prism into the interpreter and retired obsolete Apple targets…

  2. 64-Bit Length Hardening and Regexp Stability

    Core work converged on fixing 32-bit length and index assumptions ahead of a wider length type on Windows, alongside Regexp reliability backports to Ruby 3.4. Numeric sort speedups, clearer DNS errors, and new Haiku CI round out the day.

  3. Prism Built In, Length Safety, and IO Reliability

    Prism is now built into the interpreter as Ruby Prism with the prism gem becoming bundled, while C extensions migrate to the core length type and IO gains crash and timeout fixes. The pattern is structural hardening: core parser…

  4. Length Type Migration and Refinement Super Fix

    Ruby core moved aggressively to the R-B length type across core, default gems, and Y-JIT, with no behavior change today but protection against truncation on Windows. A separate fix unblocks super in module methods called through…

  5. New Length Type and JIT Performance Push

    Ruby landed groundwork for a dedicated string and array length type to lift the 2-gigabyte Windows limit, alongside ZJIT and garbage-collector speedups. Extension authors face C API and exception-behavior changes to audit.

  6. Crash Hardening and Legacy Mac Cleanup

    Ruby core landed a cluster of debug-build crash and assertion fixes for allocation, procs, and interrupt handling, while dropping PowerPC Darwin and Mac OS 10.5 support. Timezone encoding, file matching, and IP address edge cases plus…

  7. YJIT Lands on Windows

    YJIT now builds and passes checks on 64-bit Microsoft Windows, headlining a push toward JIT maturity and observability. Portable compiled code, Ractor and fork safety fixes, and a proposal to embed Prism round out the activity.

  8. Linear Compiles, Faster Windows Builds, and Clearer GC Stats

    Compilation fixes eliminate quadratic slowdowns on large methods, while Windows and portable builds get faster and more reliable. Ractor-aware garbage collector changes improve performance measurement and marking speed.

  9. Weekly Recap - JIT Hardening, Legacy Cleanup, and Crash Diagnostics
  10. Windows Reliability and Eval Fork Fixes
  11. Test Stability, Windows Builds, and Runtime Safety
  12. Runtime Hardening and Legacy Platform Cleanup
  13. Legacy Cleanup, JIT Tuning, and Buffer Work
  14. Windows Reliability and GC Safety Push
  15. JIT Speed Push and Crash Dump Overhaul
  16. Windows Reliability Push and Ractor GC Fixes
  17. Weekly Recap - Crash Hardening, ZJIT Efficiency, and Windows Cleanup
  18. I-O Buffer Safety Overhaul and Array Crash Fixes
  19. Windows Reliability Sweep and ZJIT Speedups
  20. IO Reliability Fixes, ZJIT Speedups, and Platform Hardening
  21. Crash Fixes, Regexp Hangs, and JIT Controls
  22. ZJIT Specialization Push and Memory Safety Fixes
  23. ZJIT Speed Push and Memory Safety Fixes
  24. Mutation Crashes, Relocatable Builds and ZJIT Leak Fix
  25. Weekly Recap - Memory Safety Hardening, ZJIT and Ractor Stability
  26. Mutation-Driven Crashes Fixed
  27. String Safety Fixes and Faster Keywords
  28. Use-After-Free Fixes and Ractor GC Concurrency
  29. A Week of Memory-Safety Fixes
  30. A Week of Memory Safety Fixes
  31. A Week of Use-After-Free Fixes
  32. TCP Socket Hardening and Memory Safety Sweep
  33. Weekly Recap - Coroutine Hardening & Ractor Cleanup
  34. Concurrency Rework and Compiler Speedups
  35. Set-Based Speedups and Windows Reliability
  36. ZJIT Optimization Push and Cross-Platform Reliability Fixes
  37. ZJIT Pushes Deeper, Cleanup Season Continues
  38. Ractor Ownership Overhaul
  39. Ractor Hardening and the Box Experiment Push
  40. Buffer Overruns and Boundary Bugs
  41. Weekly Recap - Box Isolation Fixes and ZJIT's Steady March
  42. Box Isolation's Rough Edges
  43. Stale Caches and Broken Invariants
  44. Trimming Memory Overhead Across the VM
  45. JIT Performance and Windows Build Fixes
  46. Windows Networking Gets Serious Attention
  47. Correctness Fixes and Post-Quantum Signing Lands in RubyGems
  48. JIT Memory and Performance Tuning
  49. Weekly Recap - Memory Trimming and the Box Model Hardens
  50. Ruby Box Hardening Push
  51. JIT Tuning and a Security Backport
  52. Scheduler Unification and Interpreter Slimming
  53. Concurrency Fixes and a Security Backport
  54. Box Isolation Under Fire, ZJIT Correctness Hardening
  55. Shrinking the Hash
  56. IO::Buffer Hardening and Memory Trimming
  57. Weekly Recap - Concurrency Hardening & Memory Trimming
  58. I O Buffer Hardening and Memory Trimming
  59. Threading Scheduler Overhaul and Race Fixes
  60. Buffer Safety and Method Cache Fixes
  61. Trimming Memory and Fixing the Coverage Tax
  62. Ractor Memory Leaks Get Squashed
  63. ZJIT Catches Up, Windows Paths Get Fixed for Real
  64. ZJIT Momentum and Marshal Hardening
  65. Weekly Recap - Concurrency Hardening and ZJIT Performance Gains
  66. M:N Threading Gets a Concurrency Overhaul
  67. Ractor Shutdown Race Fixed
  68. The M:N Scheduler Gets Hardened
  69. JIT Correctness and Garbage Collector Tuning
  70. JIT Compiler Cleanup and Garbage Collector Tuning
  71. Concurrency Lock Ordering and GC Precision
  72. Ractor Memory Cleanup and ZJIT Register Work
  73. Weekly Recap - Ractors Get Their Own Garbage Collector
  74. Garbage Collector Gets a Deep Audit
  75. Garbage Collector Gets a Closer Look
  76. The Great Ractor GC Cleanup
  77. Ractors, GC, and a Wobbly Object ID Fix
  78. Object Identity Bugs and Backtrace Accuracy
  79. Ractor Object Move Safety and JIT Precision
  80. Ractors Get Faster, and Concurrency Bugs Get Quieter
  81. Weekly Recap - Ractor Safety and ZJIT Performance Push
  82. Correctness Fixes Under Concurrency and GC
  83. Trimming Memory, One Byte at a Time
  84. ZJIT Optimizer Trims the Fat
  85. ZJIT Hardening and CI Firefighting
  86. ZJIT Cleanup and Correctness Fixes
  87. Ractors Expose Cross-Thread Race Conditions
  88. JIT Precision and Documentation Cleanup
  89. Weekly Recap - ZJIT Performance Push and a Documentation Overhaul
  90. The Great Documentation Correction
  91. Garbage Collector Cleanup and Build Chain Fixes
  92. JIT Correctness and a Same-Day Revert
  93. ZJIT's Speed Push and a Windows Cleanup Wave
  94. Memory Safety Sweep
  95. Paths, Quotes, and Longjmp Landmines
  96. Boot Time and the Struct Layout Trade-off
  97. Weekly Recap - JIT Maturity and Memory Safety
  98. Correctness Fixes Take Center Stage
  99. Edge Case Cleanup Across the Interpreter
  100. Fiber Safety and Runtime Introspection

Episode archive for Ruby Core Updates

  1. JIT Stability and the Longjmp Problem
  2. Concurrency Bugs and JIT Speedups
  3. Object Layout Cleanup and Concurrency Hardening
  4. Object Layout Overhaul and ZJIT's Inlining Push
  5. Weekly Recap - Concurrency Hardening and ZJIT Performance Push
  6. Windows Build Cleanup and CI Stability
  7. Windows CI Overhaul and Memory Safety Fixes
  8. Ractor Barrier Race Fixes and JIT Specialization Push
  9. ZJIT Performance Push and Threading Safety Fixes
  10. Threading Teardown Overhaul and ZJIT Speed Gains
  11. Garbage Collector and JIT Get a Tune-Up
  12. Memory Layout and JIT Performance Push
  13. Weekly Recap - Memory Layout and Ractor Hardening
  14. Regexp Memory Overhaul and GC Correctness Sweep
  15. Packaging and Platform Fixes Take Center Stage
  16. Ractor Safety and GC Internals Get a Hard Look
  17. Ractor Isolation Hardening
  18. Weekly Recap - JIT Performance and Memory Management
  19. Performance Optimizations and CI Infrastructure Fixes
  20. Syntax Evolution and Runtime Stability
  21. ZJIT Performance Infrastructure and Compiler Optimizations
  22. Performance Optimizations and Memory Safety Fixes
  23. Memory Safety and JIT Optimizations
  24. ZJIT Optimization and Security Hardening
  25. Security Hardening and Performance Optimization
  26. Weekly Recap - JIT Performance and Memory Management
  27. RubyGems Security and Documentation Polish
  28. Documentation Push and Runtime Improvements
  29. ZJIT Performance and Memory Safety Improvements
  30. Memory Safety and Performance Focus
  31. ZJIT Optimizations and Memory Management
  32. ZJIT Optimization Push and Documentation Improvements
  33. Performance Optimizations and Infrastructure Improvements
  34. Weekly Recap - JIT Optimization and Core Infrastructure
  35. Garbage Collection Optimizations
  36. JIT Optimization and Object Layout Changes
  37. JIT Optimizations and Marshal Security Fixes
  38. ZJIT Refactoring and Code Cleanup
  39. String Performance and Security Fixes
  40. CI Optimization and Documentation Improvements
  41. Documentation Fixes and Memory Management Improvements
  42. Weekly Recap - ZJIT Optimization & Performance Improvements
  43. ZJIT Improvements and String Performance
  44. JIT Compiler Fixes and GC Improvements
  45. CI Workflow Cleanup and Memory Management
  46. Refinement Fixes and CI Improvements
  47. Security Fixes and Testing Infrastructure Overhaul
  48. Memory Safety and Performance Optimizations
  49. Refinement Fixes and Documentation Improvements
  50. Weekly Recap - Refinements & Infrastructure Improvements
  51. ZJIT Optimizations and Bug Fixes
  52. Memory Optimization and Security Fixes
  53. JIT Improvements and Class System Refactoring
  54. ZJIT Optimizations and Bug Fixes
  55. Regexp Validation and GC Improvements
  56. String Methods and Scheduler Fixes
  57. Box Architecture Overhaul and Fiber Scheduler Fix
  58. Performance Optimizations and ZJIT Improvements
  59. Exception Handling and ZJIT Performance Fixes
  60. Refinement Fixes and Documentation Improvements
  61. Shape System Optimization and Documentation Improvements
  62. Performance and Memory Management Improvements
  63. Coverage Module and GC Improvements
  64. Weekly Recap - Shape System Optimization & Memory Performance
  65. Shape System Optimization and Documentation Improvements
  66. Shape System Optimization
  67. ZJIT Performance Enhancements and Global Variable Fixes
  68. Memory Management and Documentation Improvements
  69. JIT Optimizations and String Instruction Refactoring
  70. Garbage Collection Cleanup and ZJIT Optimization
  71. Garbage Collection API Refinements
  72. Weekly Recap - Memory Safety & Performance Enhancements
  73. Memory Safety and Write Barrier Fixes
  74. Array Method Documentation Clarification
  75. API Exposure and RubyGems Security Enhancements
  76. ZJIT Refactoring and Library Fixes
  77. C23 Compatibility and ERB Sync
  78. Memory Management and Performance Optimizations
  79. Weekly Recap - Dependency Management & Performance
  80. Weekly Recap - Performance Optimizations & Bug Fixes
  81. Development Tool Reliability Fix
  82. Weekly Recap - ZJIT Performance and Infrastructure Improvements
  83. ZJIT Performance Optimizations
  84. JIT Compiler Optimizations and Bug Fixes
  85. Ractor Fixes and JIT Improvements
  86. Memory Management and JIT Improvements
  87. ZJIT Performance Improvements and GC Optimizations
  88. CI Infrastructure Improvements
  89. Weekly Recap - ZJIT Performance & Core Infrastructure
  90. ZJIT Optimization and Developer Tools
  91. ZJIT Performance Optimizations and Source Location Revert
  92. ZJIT Performance Improvements and CI Stability Fixes
  93. ZJIT Optimization and Performance Improvements
  94. ZJIT Performance Enhancements and Regexp Freezing
  95. ZJIT Compilation Improvements and Bug Fixes
  96. Documentation Improvements and Bundler Restructuring
  97. Weekly Recap - JIT Optimization & Performance Enhancement
  98. ZJIT Array Access Optimization
  99. ZJIT Performance Improvements and Prism Parser Updates
  100. ZJIT TracePoint and Subclass Improvements
  101. ZJIT Performance and Security Fixes
  102. JIT Compiler Fixes and VM Optimizations
  103. Weekly Recap - ZJIT Optimization & Parser Modernization
  104. Parser Transition and Performance Improvements
  105. ZJIT Optimizations and Prism Compiler Improvements
  106. Threading and RubyGems Compatibility Fixes
  107. ZJIT Optimization and Core Fixes
  108. ZJIT Optimizations and Zlib Updates
  109. Threading Fixes and Memory Optimization
  110. Weekly Recap - JIT Optimizations and Bug Fixes
  111. JSON Gem Security and Release Update
  112. ZJIT Performance Enhancements and Bug Fixes
  113. ZJIT Optimizations and Prism Parser Improvements
  114. ZJIT Optimization and WeakMap Bug Fix
  115. JIT Improvements and New ENV Method
  116. ZJIT Performance Optimizations
  117. Parser Refactoring and Lrama 0.8.0
  118. GitHub Actions Security Hardening
  119. ZJIT Optimizations and Error Handling
  120. Memory Management and Parser Enhancements
  121. ZJIT Improvements and Documentation Fixes
  122. YJIT Memory Safety and GC Improvements
  123. Prism Integration and Performance Enhancements
  124. Major Performance and API Enhancements
  125. ZJIT Performance Improvements and Method Equality Fix
  126. Documentation Fixes and JSON Performance Improvements
  127. Test Reliability and Performance Fixes
  128. Test Stability and Documentation Improvements
  129. ZJIT Performance Enhancements and GC Improvements
  130. Segfault Fix and Performance Improvements
  131. ZJIT Performance and Documentation Updates
  132. ZJIT Performance Improvements and Documentation Updates
  133. ZJIT Compiler Enhancements and Core Bug Fixes
  134. ZJIT Performance Improvements and File Optimization
  135. Performance Optimizations and JIT Improvements
  136. ZJIT Optimizations and Core Stability Fixes
  137. Week of January 06 - January 13, 2026
  138. January 12, 2026
  139. January 11, 2026
  140. January 10, 2026
  141. January 09, 2026
  142. January 08, 2026
  143. January 07, 2026
  144. January 06, 2026

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