Github user okram commented on the issue:
So the most frequently called method will be `Bindings.getBoundVariable()`.
It is called on every `Bytecode.convertArguments()` which is called on every
instruction addition. Next, one of primary benefits of the static nature of
`Bindings` (now) is that there is no longer a `transient` reference to them in
`Bytecode` as we can statically access the data.
In terms of the cost of `ThreadLocal.get()`. Dunno..... perhaps a
`clock()`? I can't imagine it being too crazy given that you will never really
have that many entries. ?
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