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01
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What is the performance cost of Proxy and when should it not be used?
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A.
Proxy has zero cost in modern JS engines; same speed as direct access
B.
Proxy can also be applied to string and number values; every JavaScript value can be wrapped with Proxy
C.
Extra cost on every property access; careful in hot paths; cannot be applied to primitive values
D.
Proxy only costly in read operations; no cost in write operations
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