Questionable perf_hooks import

[NeKzor]

Any reason why this is part of the library?

sourcelib/packages/kv/src/tokenizer.ts

Line 7 in b58d4b0

const tokenizeFileFunction = performance.timerify(tokenizeInternal);

Found this while testing the package in a different runtime which does not support this API yet but the usage of timerify seems very application specific.