Can it automate the optimization process?

Yes, you can run the /axiom:optimize-build command to trigger an automated scan of your project for common configuration issues and immediate 'quick-win' fixes.

How does this skill help with slow Swift compilation?

It helps you enable specific compiler flags to identify functions and expressions that exceed type-checking time limits, providing proven refactoring patterns to speed them up.

Is this useful for CI/CD environments?

Absolutely. It provides specific patterns for optimizing script phases and caching artifacts that significantly reduce the time and cost of clean builds in CI pipelines.

Does it support the latest Xcode 26 features?

Yes, it includes comprehensive workflows for enabling and verifying Xcode 26 features like compilation caching and explicit module builds to maximize performance.

What is the 'Critical Path' in build performance?

The critical path is the longest chain of dependent tasks in your build. This skill helps you identify and break these dependencies to enable better parallelization across CPU cores.

Xcode Build Performance Optimizer

Name: Xcode Build Performance Optimizer
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Optimizes Xcode build times for Apple platform development by analyzing bottlenecks and implementing battle-tested performance patterns.

This skill provides a systematic framework for analyzing and accelerating Xcode build performance across iOS, macOS, and visionOS projects. It guides developers through measuring baselines, interpreting the Xcode Build Timeline, and identifying common bottlenecks such as slow Swift type checking, inefficient build scripts, and suboptimal compilation modes. With specialized support for modern Xcode features—including Xcode 26 compilation caching and explicit modules—it helps maintain fast developer iteration loops and reduces CI/CD overhead for complex Apple platform applications.

Key Features

01Automated build scanning and quick-fix recommendations via the optimize-build agent.

02Swift type-checking diagnostics to pinpoint and refactor slow-compiling code.

03Advanced support for Xcode 26 compilation caching to speed up clean builds.

04Critical path analysis using the Xcode Build Timeline to identify serial bottlenecks.

05Optimization strategies for build phase scripts, architecture settings, and debug formats.

06233 GitHub stars

Use Cases

01Reducing long incremental build times that disrupt the daily developer workflow.

02Investigating and resolving build performance regressions after major project updates.

03Optimizing CI/CD pipelines to lower build costs and accelerate pull request feedback.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-build-performance

For use in Claude.ai and ChatGPT

Download Skill