Commits on Jan 14, 2022

1. optimize __createBinding …

   Reflect microsoft/TypeScript#46997:
   
   When the binding is itself one that was created by `__createBinding`,
   re-use its descriptor, which avoids piling multiple levels of getters in
   the case of multiple levels of exports.
   
   In addition, reuse a descriptor if the bindings is marked as
   non-writable and non-configurable, which makes a getter not
   necessary.  (This can be done manually if needed, even though tsc
   doesn't do it now.)
   
   Could be considered as a fix for #165 -- first, this PR prevents piling
   up multiple layers of getters.  Second, it allows a hack of adding
   
       if (typeof exports === "object") exports = Object.freeze(exports);
   
   to avoid getters altogether.  (And in the future, tsc could mark `const`
   exports as non-writable and non-configurable which would make it
   possible to avoid this hack.)

   

   elibarzilay committed Jan 14, 2022
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