I'm curious about the time complexity of this method compared to using .length on an array. Check out this link for more information: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/size
I'm curious about the time complexity of this method compared to using .length on an array. Check out this link for more information: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/size
The Array object's length property is defined as a simple read-only data property, while the Map object's size property is an accessor property that calculates the number of items by iterating through the list of Map entries.
Although the spec states that size has a time complexity of O(n) as it loops through the entries, I would expect JavaScript engines to optimize this process for better performance in practice.
Therefore, while theoretically the time complexity of Map.prototype.size in JavaScript is O(n), in reality, it is likely to be more efficient than that due to optimization by JavaScript engines.
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