Cheng, Long wrote: > We think we found a bug in lj_gc_step_jit, here is the detail: Thank you very much for the bug report and the detailed explanation! Fixed in the git repository. This is actually a long-standing bug in LuaJIT 2.x. It doesn't lead to incorrect behavior, but it affects GC throughput. E.g. the binarytrees benchmark is 15% faster with this bug fixed ... ouch. --Mike