JRuby 10.1.x

List view

Use ScopedValue when available for thread context

Status: Open.

#9496 In jruby/jruby;

· headius opened on Jun 13, 2026

Modify interface implementations to use invokedynamic for upcalls

Status: Open.

#9497 In jruby/jruby;

· headius opened on Jun 13, 2026

Explore lambda conversion for remaining uses of reflection

Status: Open.

#9455 In jruby/jruby;

· headius opened on May 22, 2026

Lazily acquire singleton class for instance_eval

Status: Draft (not ready).

jruby/jrubynumber 9440

#9440 In jruby/jruby;

· headius opened on May 11, 2026

VM stalls when transferring to a non-blocking fiber

Status: Open.

#9514 In jruby/jruby;

· just-wanna-report-bugs opened on Jun 29, 2026

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

Status: Open.

#9505 In jruby/jruby;

· samuel-williams-shopify opened on Jun 25, 2026

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

Status: Open.

#9506 In jruby/jruby;

· samuel-williams-shopify opened on Jun 25, 2026

Signal.trap with numeric USR1 value traps SIGBUS on Linux

Status: Open.

#9510 In jruby/jruby;

· samuel-williams-shopify opened on Jun 27, 2026

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

Status: Open.

#9278 In jruby/jruby;

· ntkme opened on Mar 2, 2026

Enumerator creation does not propagate keyword arguments

Status: Open.

#8750 In jruby/jruby;

· headius opened on Apr 5, 2025

Reduce overhead of invokedynamic binding

Status: Open.

#8756 In jruby/jruby;

· headius opened on Apr 8, 2025

Migrate one-shot classloading to hidden classes

Status: Open.

#8837 In jruby/jruby;

· headius opened on May 13, 2025

Handle eval from JIT frames specially for backtrace

Status: Open.

#8937 In jruby/jruby;

· headius opened on Aug 2, 2025

Regex caching prevents repeated warnings

Status: Open.

#8938 In jruby/jruby;

· headius opened on Aug 2, 2025

Core respond_to? checks should not trigger method_missing

core

needs tests

Status: Open.

#9048 In jruby/jruby;

· headius opened on Oct 29, 2025

Dynamic instance variables allocate too large of a table

Status: Open.

#9139 In jruby/jruby;

· headius opened on Dec 11, 2025

Waking a sleep triggers an expensive InterruptedException

Status: Open.

#9140 In jruby/jruby;

· headius opened on Dec 13, 2025

Implement fast float parsing and to_s

Status: Open.

#9162 In jruby/jruby;

· headius opened on Jan 7, 2026

Expand .freeze optimization to literal arrays and hashes

Status: Open.

#9165 In jruby/jruby;

· headius opened on Jan 8, 2026

Optimize literal array used only to call a method

Status: Open.

#9166 In jruby/jruby;

· headius opened on Jan 8, 2026

Optimize case === dispatch for core types

Status: Open.

#9167 In jruby/jruby;

· headius opened on Jan 8, 2026

Optimize math and bitwise operators for unknown types

jit

performance

Status: Open.

#9168 In jruby/jruby;

· headius opened on Jan 8, 2026

Optimize backref and lastline globals with pre/post call setup

jit

performance

Status: Open.

#9169 In jruby/jruby;

· headius opened on Jan 8, 2026

Consider optimizing more core methods to avoid dispatch

jit

performance

Status: Open.

#9170 In jruby/jruby;

· headius opened on Jan 8, 2026

Ruby 4.0.1 fixes

Status: Open.

#9179 In jruby/jruby;

· headius opened on Jan 14, 2026