Andreas Kling d0b11af387 LibJS: Make typeof a lot faster by caching all possible results ...

The typeof operator has a very small set of possible resulting strings,
so let's make it much faster by caching those strings on the VM.

~8x speed-up on this microbenchmark:

    for (let i = 0; i < 10_000_000; ++i) {
        typeof i;
    }

2024-07-23 11:47:37 +02:00

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