Hi All, I was trying out luaffi on my Ubuntu 12.04 64-bit VM with 1.5GB of RAM. I tried out the greyscale conversion example code on the FFI introduction page: http://luajit.org/ext_ffi.html However, using luaffi with Lua 5.2.0, the program runs out of memory before finishing the loop. Running it with a collectgarbage("count") shows the memory usage steadily going up with each iteration, and top reports similar results. When run with LuaJIT, the memory usage is steady at less than 700Kbytes for the entire run. If I insert a collectgarbage("collect") to run a full collection in the loop, then it is fine. James Graves