[Home](./index.md) > [server](./server.md) > [IterationMap](./server.iterationmap.md) ## IterationMap class A high-performance Map-like data structure optimized for frequent iteration. **Signature:** ```typescript export default class IterationMap ``` ## Remarks IterationMap maintains both a Map for O(1) lookups and an Array for fast iteration, eliminating the need for Array.from() calls and providing \~2x faster iteration than Map.values(). Optimized for "build up, iterate, clear" usage patterns common in game loops. ## Example ```typescript const iterationMap = new IterationMap(); iterationMap.set(1, 'hello'); iterationMap.set(2, 'world'); // Fast O(1) lookup const value = iterationMap.get(1); // Fast array iteration (no Map.values() overhead) for (const item of iterationMap.valuesArray) { console.log(item); } // Efficient bulk clear iterationMap.clear(); ``` ## Properties

Property	Modifiers	Type	Description
[size](./server.iterationmap.size.md)	`readonly`	number	Returns the number of key-value pairs in the IterationMap.
[valuesArray](./server.iterationmap.valuesarray.md)	`readonly`	readonly V\[\]	Returns a readonly array of all values for fast iteration. This is the key performance feature - use this instead of .values() for iteration.

## Methods

Method	Modifiers	Description
[\[Symbol.iterator\]()](./server.iterationmap._symbol.iterator_.md)		Returns an iterator for the key-value pairs in the IterationMap.
[clear()](./server.iterationmap.clear.md)		Removes all key-value pairs from the IterationMap. Highly optimized for the common "build up, iterate, clear" pattern.
[delete(key)](./server.iterationmap.delete.md)		Removes the key-value pair from the IterationMap.
[entries()](./server.iterationmap.entries.md)		Returns an iterator for the key-value pairs in the IterationMap.
[forEach(callbackfn, thisArg)](./server.iterationmap.foreach.md)		Executes a provided function once for each key-value pair.
[get(key)](./server.iterationmap.get.md)		Returns the value associated with the key, or undefined if the key doesn't exist.
[has(key)](./server.iterationmap.has.md)		Returns true if the key exists in the IterationMap.
[keys()](./server.iterationmap.keys.md)		Returns an iterator for the keys in the IterationMap.
[set(key, value)](./server.iterationmap.set.md)		Sets the value for the key in the IterationMap.
[values()](./server.iterationmap.values.md)		Returns an iterator for the values in the IterationMap. Note: For performance-critical iteration, use .valuesArray instead.