问题描述
随着我的项目在过去的一年中不断发展，其构建时间也随之增加。在过去的几个月中，时间从4分钟缩短到了大约7分钟（时间包括GitHub拉取，单元测试等）。
As my project has grown over the past year, so have its build times. Over the last few months it's gone from 4 minutes to around 7 (time includes GitHub pull, unit tests, etc).
我已经使用 -Xfrontend -debug-time-function-bodies 进行了调查，以找出编译较慢的行，并更改了该代码。
I have investigated with -Xfrontend -debug-time-function-bodies to find lines that are slow to compile, and changed that code.
我认为现在这是项目规模的问题； 182个Swift文件，≈31K行。 23个情节提要，52个XIB。这是一个常规的UIKit应用程序，具有一些Cocoapods依赖项。
I believe it's now a question of project size; 182 Swift files, ≈31K lines. 23 storyboards, 52 XIBs. This is a regular UIKit app with a handful of Cocoapods dependencies.
大部分构建时间都花在了编译Swift源文件阶段。
The bulk of the build time is spent in the "Compiling Swift source files" phase.
我关心的构建机器时间比edit-build-debug周期要少，后者也一直在变慢。
The build machine time I care less about than the edit-build-debug cycle, which has also been slowing.
什么可以改善构建时间吗？
What can be done to improve build times?
推荐答案
这里是有关基准测试/加快编译时间的文章-。
Here's an article about benchmarking/speeding up compilation time - swift-profiling.
万一它死了，这里是tldr：
In case it goes dead here is the tldr:
xcodebuild -workspace App.xcworkspace -scheme App clean build OTHER_SWIFT_FLAGS="-Xfrontend -debug-time-function-bodies" | grep .[0-9]ms | grep -v ^0.[0-9]ms | sort -nr > culprits.txt
您可以运行它，或在另一个swift下将以下标志添加到构建中-构建设置中的标志：
You can just run that or add the following flags to your build under the other-swift-flags in build settings:
-Xfrontend -warn-long-function-bodies=100
这将向您显示哪些行在减慢您的编译时间。
This will show you which lines are slowing down your compile time.
这篇关于加快Xcode Swift的构建时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！