Although I only looked at the code briefly I suspect it will very hard to get good performance from the API as provided[1]. It looks like you have to do a func

Although I only looked at the code briefly I suspect it will very hard to get good performance from the API as provided[1]. It looks like you have to do a function call for every high level assembly instruction which in turn does quite a bit of work. See `emit_x86_instruction`[2], most of which is redundant and most of which can be done ahead of time. To JIT quickly you want to work with templates if at all possible. Precompile those templates for the relevant architecture. Then at runtime you just patch the precompiled machine code with the correct addresses and registers. This extra speed really matters because if JITing code is cheap you can compile functions multiple times, inline aggressively and do many other optimizations that wouldn't be economical otherwise. [1] https://github.com/zherczeg/sljit/blob/master/test_src/sljitTestCall.h https://github.com/zherczeg/sljit/blob/master/test_src/sljit... [2]: https://github.com/zherczeg/sljit/blob/master/sljit_src/sljitNativeX86_64.c https://github.com/zherczeg/sljit/blob/master/sljit_src/slji...