Discover the Problem of Swift Building Times #swiftlang #iosdev

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Swift・iOSコラム

1 min readJan 7, 2017

The other day, giginet/xcprofiler is released on GitHub.

giginet/xcprofiler

xcprofiler - CLI to profile compilation time of Swift project

github.com

The author, giginet(ぎぎにゃん) is introduced it in detail on the following blog in Japanese.

Swiftプロジェクトのビルド時間を計測・改善するxcprofilerを作った話 — クックパッド開発者ブログ

技術部モバイル基盤グループの@giginetです。我々のチームでは、iOS/Androidアプリの認証、決済、ロギングと言った基幹部分の開発のほか、各事業部のモバイルエンジニアの開発効率を上げるための業務改善を日々行っています。その…

techlife.cookpad.com

In short, this tool is to show building times for each functions using -debug-time-function-bodies. For more information, see the README.

More importantly

Brian Gesiak (もどかしい) and other developers had already discussed with-debug-time-function-bodies at the Swift.org bug tracking system, and other blogs.

[SR-2741] Provide Structured Output Of debug-time-function-bodies - Swift

I would understand that if the larger conversation should be around how to not get into these slow compile paths, or…

bugs.swift.org

Also, he had mentioned this tool on Twitter.

I think this tool is useful to clear how slow build times are.

Then, it’s more importantly to be reasonable and try to see what caused it. Like Brian said at bugs.swift.org, we can submit reports to solve the problem using such tools as giginet/xcprofiler.

I’ve contributed giginet/xcprofiler, so I’d like to improve it and contribute Swift community to solve the problem.