# efficient-data-structures

> Match data structures to access patterns: Arrays for ordered, indexed access; Sets/Maps for uniqu... Use when optimizing code performance. Performance category skill.

- Author: OmniaffixDave
- Repository: OmniaffixDave/SessionGuardian
- Version: 20260205125233
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- Last Updated: 2026-02-08
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---

---
name: efficient-data-structures
description: "Match data structures to access patterns: Arrays for ordered, indexed access; Sets/Maps for uniqu... Use when optimizing code performance. Performance category skill."
metadata:
  category: Performance
  priority: medium
  is-built-in: true
  session-guardian-id: builtin_efficient_data_structures
---

# Efficient Data Structures

Match data structures to access patterns: Arrays for ordered, indexed access; Sets/Maps for uniqueness and fast lookup; Queues for FIFO processing; Stacks for LIFO. Consider memory layout—arrays are cache-friendly for iteration. For large datasets, consider specialized structures like tries, heaps, or bloom filters. Understand the complexity of operations on your chosen structure.