JRuby 10.1.x

Issues

• Use ScopedValue when available for thread context

  jruby/jruby#9496 · Filter by author headius opened on Jun 13, 2026 · JRuby 10.1.x

• Modify interface implementations to use invokedynamic for upcalls

  jruby/jruby#9497 · Filter by author headius opened on Jun 13, 2026 · JRuby 10.1.x

• Explore lambda conversion for remaining uses of reflection

  jruby/jruby#9455 · Filter by author headius opened on May 22, 2026 · JRuby 10.1.x
  1

• Lazily acquire singleton class for instance_eval

  Unread
  jruby/jruby#9440·headius opened May 11, 2026 · Updated Jun 13, 2026·Draft
  1

• VM stalls when transferring to a non-blocking fiber

  jruby/jruby#9514 · Filter by author just-wanna-report-bugs opened on Jun 29, 2026 · JRuby 10.1.x
  7

• IO.select misses readability when the same UNIXSocket is also in the write list

  jruby/jruby#9505 · Filter by author samuel-williams-shopify opened on Jun 25, 2026 · JRuby 10.1.x
  2

• IO.select does not report TCP out-of-band data as priority readiness

  jruby/jruby#9506 · Filter by author samuel-williams-shopify opened on Jun 25, 2026 · JRuby 10.1.x
  1

• Signal.trap with numeric USR1 value traps SIGBUS on Linux

  jruby/jruby#9510 · Filter by author samuel-williams-shopify opened on Jun 27, 2026 · JRuby 10.1.x

• resolv gem broken under bundle on jruby-head on windows after recent ruby 4.0 change

  jruby/jruby#9278 · Filter by author ntkme opened on Mar 2, 2026 · JRuby 10.1.x
  7

• Enumerator creation does not propagate keyword arguments

  jruby/jruby#8750 · Filter by author headius opened on Apr 5, 2025 · JRuby 10.1.x

• Reduce overhead of invokedynamic binding

  jruby/jruby#8756 · Filter by author headius opened on Apr 8, 2025 · JRuby 10.1.x

• Migrate one-shot classloading to hidden classes

  jruby/jruby#8837 · Filter by author headius opened on May 13, 2025 · JRuby 10.1.x

• Handle eval from JIT frames specially for backtrace

  jruby/jruby#8937 · Filter by author headius opened on Aug 2, 2025 · JRuby 10.1.x

• Regex caching prevents repeated warnings

  jruby/jruby#8938 · Filter by author headius opened on Aug 2, 2025 · JRuby 10.1.x

• Core respond_to? checks should not trigger method_missing

  coreneeds tests
  jruby/jruby#9048 · Filter by author headius opened on Oct 29, 2025 · JRuby 10.1.x
  1

• Dynamic instance variables allocate too large of a table

  jruby/jruby#9139 · Filter by author headius opened on Dec 11, 2025 · JRuby 10.1.x
  1

• Waking a sleep triggers an expensive InterruptedException

  jruby/jruby#9140 · Filter by author headius opened on Dec 13, 2025 · JRuby 10.1.x
  3

• Implement fast float parsing and to_s

  jruby/jruby#9162 · Filter by author headius opened on Jan 7, 2026 · JRuby 10.1.x

• Expand .freeze optimization to literal arrays and hashes

  jruby/jruby#9165 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x
  2

• Optimize literal array used only to call a method

  jruby/jruby#9166 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x
  1

• Optimize case === dispatch for core types

  jruby/jruby#9167 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x

• Optimize math and bitwise operators for unknown types

  jitperformance
  jruby/jruby#9168 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x
  1

• Optimize backref and lastline globals with pre/post call setup

  jitperformance
  jruby/jruby#9169 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x

• Consider optimizing more core methods to avoid dispatch

  jitperformance
  jruby/jruby#9170 · Filter by author headius opened on Jan 8, 2026 · JRuby 10.1.x
  1

• Ruby 4.0.1 fixes

  jruby/jruby#9179 · Filter by author headius opened on Jan 14, 2026 · JRuby 10.1.x