What is the Time Complexity of Retrieval and Lookup Operations in V8\'s Implementation of ES6 Map and Set?

ES6 Map and Set Complexity in V8 Implementation

Question:

Can we assume that retrieval and lookup operations in V8's implementation of ES6 Map and Set have a time complexity of O(1)?

Answer:

Yes, it is a fair assumption.

V8 utilizes a variant of hash tables, which typically offer O(1) complexity for lookup operations. In fact, V8 specifically employs OrderedHashTable and builds upon the principles found in https://wiki.mozilla.org/User:Jorend/Deterministic_hash_tables. This implementation aligns with the O(1) complexity expected for these operations.

Please note that while the standard itself does not guarantee O(1) complexity, V8's implementation achieves it in practice.

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