# fastred/Optimizing-Swift-Build-Times

Collection of advice on optimizing compile times of Swift projects.

Repository: https://github.com/fastred/Optimizing-Swift-Build-Times
Canonical: https://ross.abutalabs.com/products/optimizing-swift-build-times
Language: Swift
License: MIT
License Family: permissive
Topics: swift, compile, time, compile-time, build-time
Last push: 2019-02-01T10:33:15+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3236, "days_push": 2770, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3585, forks 143 (observed 2026-08-28T04:08:11.087858+00:00)

## What it is
A curated collection of advice and techniques for reducing compile times in Swift projects, covering Xcode build settings, compiler flags, and modularization strategies. It is documentation-style guidance maintained as a GitHub repository rather than a runnable tool.

## Use cases
- speed up slow swift build times
- find which swift functions compile slowly
- configure xcode incremental compilation for debug builds
- reduce compile time of large ios app
- warn on long type-checking expressions in swift
- optimize xcode build settings for faster compiles

## When to choose
- you develop medium-to-large Swift or iOS projects suffering from long build times
- you want a curated checklist of Xcode and Swift compiler settings to tune
- you need to identify slow-to-compile functions and expressions

## When to avoid
- you need an automated tool that measures or enforces build times rather than advice
- your project is not written in Swift or not built with Xcode
- you expect a maintained software release rather than a documentation repository

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: build-tool, developer-tools
- domain: developer-tools, performance, apple-ecosystem
- platform: -
- tags: swift, xcode, compile-times, build-optimization, guide, macos

## Member repositories
- fastred/Optimizing-Swift-Build-Times (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:11.087858+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:33:54.847138+00:00, confidence not recorded.
  - readme: https://github.com/fastred/Optimizing-Swift-Build-Times (fetched 2026-08-28T04:08:11.087858+00:00, sha f54088c033d3)
- Data as of 2026-08-30T08:39:29.467469+00:00.