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* Javier Guerra Giraldez:

> i see several deep differences.  all doable, but only if you do real
> compilation and not just source translation.
> - Lua can use any value as a table key, JS only supports strings
> - variable hoisting vs. lexical scoping
> - 0, "" and [] are falsy in JS, true in Lua
> - coroutines

- tail calls

- weak references

In comparison, differences in name lookup look easier to address, and
with less of a performance impact.