Issues

• ZJIT: Don't copy Assembler contents around

  Shopify/ruby#1077 · Filter by author tekknolagi opened on Oct 1, 2026

• ZJIT: Consider differentiating "local" vs "global" vregs in LIR

  Shopify/ruby#1076 · Filter by author tekknolagi opened on Oct 1, 2026

• ZJIT: handle_caller_saved_regs is slow (quadratic in # vregs)

  Shopify/ruby#1075 · Filter by author tekknolagi opened on Oct 1, 2026

• ZJIT: Speed up the compiler

  Shopify/ruby#1074 · Filter by author tekknolagi opened on Oct 1, 2026

• ZJIT: write_byte in CodeBlock is slow

  Shopify/ruby#1073 · Filter by author tekknolagi opened on Oct 1, 2026

• ZJIT: Add alias analysis

  Shopify/ruby#1071 · Filter by author tekknolagi opened on Sep 27, 2026

• ZJIT: We are missing opportunities to elide inline frames

  Shopify/ruby#1070 · Filter by author tekknolagi opened on Sep 24, 2026
  1

• ZJIT: Rename send_frame_state and send_state

  Shopify/ruby#1069 · Filter by author k0kubun opened on Sep 23, 2026

• ZJIT: Inline SendDirect callees that receive a &proc block arg

  Shopify/ruby#1068 · Filter by author dak2 opened on Sep 23, 2026
  1

• ZJIT: Fix quadratic caller-saved regs in backend

  Shopify/ruby#1065 · Filter by author tekknolagi opened on Sep 23, 2026

• ZJIT: Cache iseq_may_write_block_code on iseq (payload?)

  Shopify/ruby#1064 · Filter by author tekknolagi opened on Sep 23, 2026

• ZJIT: Also run optcarrot benchmark with --opt

  Shopify/ruby#1063 · Filter by author tekknolagi opened on Sep 23, 2026

• ZJIT: Make Integer#<< return Integer and not Fixnum

  bug
  Shopify/ruby#1062 · Filter by author tekknolagi opened on Sep 23, 2026
  1

• ZJIT: Optimize Time#utc?

  Shopify/ruby#1060 · Filter by author tekknolagi opened on Sep 22, 2026

• ZJIT: Optimize String#match?

  Shopify/ruby#1059 · Filter by author tekknolagi opened on Sep 22, 2026
  1

• ZJIT: Optimize Kernel#dup

  Shopify/ruby#1058 · Filter by author tekknolagi opened on Sep 22, 2026

• ZJIT: Cold code region

  Shopify/ruby#1056 · Filter by author k0kubun opened on Sep 19, 2026
  3

• ZJIT: --zjit-trace-fallbacks (rb_zjit_record_exit_stack) not ractor safe

  Shopify/ruby#1054 · Filter by author XrXr opened on Sep 17, 2026
  1

• ZJIT: Inline Array#first and Array#last

  Shopify/ruby#1052 · Filter by author k0kubun opened on Sep 16, 2026
  1

• ZJIT: Investigate FxHash

  Shopify/ruby#1049 · Filter by author tekknolagi opened on Sep 14, 2026

• ZJIT: Add a wrapper of method call metadata and frame layout

  Shopify/ruby#1048 · Filter by author k0kubun opened on Sep 11, 2026

• ZJIT: Support lazy allocation of Array in stack maps

  Shopify/ruby#1046 · Filter by author k0kubun opened on Sep 9, 2026
  1

• ZJIT: Seed ObjectAllocClass flags

  Shopify/ruby#1045 · Filter by author tekknolagi opened on Sep 9, 2026

• ZJIT: Implement Global Load Store Optimization

  Feature

  Shopify/ruby#1043 · Filter by author jacob-shops opened on Sep 8, 2026
  

• ZJIT: Do less GC work for ProfiledType

  Shopify/ruby#1042 · Filter by author tekknolagi opened on Sep 8, 2026
  1