Does anybody know which kind of scripting language I could use for next given requirements?

I've got a program who, from the Scripting Library point of view, acts like following:

Program -> Script -> Program

I need to pass a Script some data, and the Script should be able to edit it.
It's binary data (char*).

Every instance of the "Scripting engine" must be able to store a pointer.

It also needs a fast constructor.

I've tried chaiscript, but it prefers std::string and its constructor is very slow (1 or 2 seconds).
I've also tried LUA, but it won't handle binary data so good, and interfacing with the program is hard, and in four days I still don't understand how to set my pointer into the object.

Any suggestion?
closed account (Dy7SLyTq)
python or javascript
I'm not so sure about either one...
Maybe python.
My requirements changed a bit:

The script must call a C++ function with some text, like a printf function.
C++ because it's a thiscall (or at least call a C function with a custom pointer).
I'm considering angelscript right now.
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