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luajit.me

A power tool to peek into LuaJIT internals, primarily for educational purposes

Try live at https://luajit.me

Features

1. execute arbitrary Lua code and see what happens
2. several snippets showcasing interesting quirks of LuaJIT are readily available
3. upload and study jit.dump output [TBD]
4. explore bytecode behind the source code in several modes
   • Lua — bytecodes are hidden, revealed on click on a source line
   • Bytecode — only bytecode is displayed
   • Mixed — bytecodes interleaved with Lua source code
5. browse generated JIT-compiled traces
   • visually examine trace graph
   • highligh source code lines and/or bytecodes participating in a trace
6. examine trace properties, including general info, IR and the assembly
7. Presentation Mode — hit P to reduce visual clutter; suitable for presenting after a moderate zoom

Gallery