I added a memory fuzzer in https://bugs.webkit.org/show_bug.cgi?id=169976 It could be better: - add set() and shadow memory, this requires tracking when memory is shared - Support: empty, exported - Imported memory created through the JS API (both before and after instantiation, to cause recompilation) - recursive calls (randomly call other instance's exports, potentially exhausting stack) - Simplify code by allowing .Code().ExportFunction(...) in builder