Inline Caching News Today

This is the Part 2 of a series. Feel free to read the prequel for more context: Building the fastest Lua interpreter automatically Building a good VM for a dynamic language takes a ton of engineerin

or a subclass. This is not a simple process like “call the function at the given address specified by the type”. The runtime has to find out what kind of object add is. Maybe it’s just a function, or maybe it’s a property, or maybe it’s some custom descriptor protocol thing. There’s no way to just turn this into a call instruction! Runtime type information Though dynamic runtimes do not know ahead of time what types variables have at any given opcode, they do eventually find out ...