memory

Optimize Swift performance using InlineArray and Span for memory access.

603|51|Updated Oct 29, 2025
One-click install
npx skills add https://github.com/rshankras/claude-code-apple-skills --skill memory-rshankras
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: memory
Source: https://github.com/rshankras/claude-code-apple-skills/tree/main/skills/swift/memory
Command: npx skills add https://github.com/rshankras/claude-code-apple-skills --skill memory-rshankras

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers optimize Swift code by leveraging new low-level memory types like InlineArray and Span for efficient, zero-overhead memory access and fixed-size collections.

Core Features & Use Cases

  • InlineArray: For fixed-size, stack-allocated collections without heap overhead. Ideal for small, compile-time known data structures.
  • Span: Provides safe, zero-cost access to contiguous memory, acting as a modern, safer alternative to UnsafeBufferPointer.
  • Use Case: Optimize a performance-critical rendering loop by replacing a heap-allocated Array with an InlineArray for vertex data, or use Span to safely process raw byte buffers from network requests.

Quick Start

Explain how to use InlineArray for a fixed-size collection of 5 integers.

Frequently Asked Questions about memory

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I eliminate heap allocations in Swift for fixed-size collections?

Eliminate heap allocations in Swift by using `InlineArray` for fixed-size, stack-allocated collections. It provides a contiguous memory layout without heap overhead, making it ideal for small, compile-time known data structures.

What is the best way to safely access contiguous memory in Swift without unsafe pointers?

The best way to safely access contiguous memory is using Swift's `Span` type. `Span` provides safe, zero-cost access to contiguous memory regions, acting as a modern alternative to `UnsafeBufferPointer`.

Can I use InlineArray for vertex data in a performance-critical rendering loop?

Yes, you can use `InlineArray` for vertex data in a performance-critical rendering loop. Replacing a heap-allocated `Array` with an `InlineArray` removes heap allocation overhead and improves rendering efficiency.

How does Swift Span handle raw byte buffers from network requests?

Swift `Span` handles raw byte buffers by providing safe, zero-cost contiguous memory access for binary data processing. It allows you to process network bytes efficiently without the risks associated with unsafe pointers.

When do I need to use stack-allocated collections instead of heap-allocated arrays in Swift?

Use stack-allocated collections when you need optimal Swift performance for small, fixed-size datasets. Stack allocation avoids heap overhead and garbage collection pauses, which is crucial for low-level memory management.