Collection Capacity Optimization

Snippet

Collection Capacity Optimization

By providing an initial capacity to a List, you prevent multiple memory re-allocations as the list grows, improving performance.

snippet.cs

csharp

using System.Collections.Generic;
 
public class EfficiencyDemo
{
    public void PreallocateList()
    {
        // Pre-allocate space for 1000 items to avoid resizing
        var data = new List<int>(1000);
        
        for (int i = 0; i < 1000; i++)
        {
            data.Add(i);
        }
    }
}

Breakdown

new List<int>(1000)

Initializes the list with an internal array of size 1000.

data.Add(i);

Adds items without triggering a resize operation.

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Collection Capacity Optimization

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