Hi everyone, Thank you for responding! > Are you interested in any particular aspects? The LuaJIT source is Nothing specific. I have only worked with method-at-a-time JITs in the past and consequently have little more than an armchair idea of how a tracing JIT works. I want to change that. One thing: how will a sampling profiler be more informative than perftools? What is the motivation behind adding a second profiler to LuaJIT? Thanks! -- Sanjoy Das http://playingwithpointers.com