Computer Science • Data structures

Array vs Linked List

Summary

Arrays store elements in contiguous memory slots allowing O(1) random access and excellent CPU cache locality. Linked lists store disjoint nodes connected by pointers, enabling O(1) node insertion without reallocation but requiring O(n) traversal.

Core Principles

Contiguous memory allocations versus pointer nodes: cache locality, insertion speeds, and indexing trade-offs.

Understanding this topic provides critical context for software design, runtime execution, and computational trade-offs.

Why It Matters in Computing

In modern software systems, abstractions exist to shield developers from lower-level mechanics. However, when systems scale, encounter latency spikes, or experience production failures, understanding these fundamentals allows engineers to diagnose root causes and make optimal architectural choices.

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