runtime

The subject is the runtime environment of a programming language.

Well, the JVM is a high quality, mature, very fast, cross platform runtime.

Only that this is perhaps the most common case, because type info still exists at runtime.

AOT-compiled Lisp generally retains the type info you need at runtime in one way or another.

If you try to cast a pointer into your function type, you'll get a runtime error, not a compile time one.

Compile and runtime errors are clearly pointed out, usually with helpful error messages.

Counting the slice of runtime cluster needed to run it I'd estimate around $20-25 per app as a minimum.

The less possibilities exist for data to change, the more you know about it during runtime, the easier it is to reason about it.

I cannot tell anything about the level of isolation for XUL runtime itself though - i.e.

Cluster nodes are p2p, nodes can be added and removed at runtime.

In other words, it's a runtime-library issue, not a compiler issue.

Expert: Participates in the development and direction of the language or major frameworks, or extremely deep knowledge of some uncommon area of the language's semantics/runtime.

You're right that "everything is an object" is not the most performant way to build a runtime, but it suits the purposes for which Ruby was designed very well.

I find that a good movie is usually between "book" and "TV" -- something with the format/runtime that drives a different expression both in writing and directing.