Swift compile time regression with optimizations enabled
| Originator: | brady | ||
| Number: | rdar://50353228 | Date Originated: | 4/1/2019 |
| Status: | Resolved: | ||
| Product: | Xcode | Product Version: | 10.2.1 |
| Classification: | Reproducible: | Always |
Summary: We have a file that took seconds to compile in Xcode 10.1 that now takes 40 minutes to compile in Xcode 10.2. This is blocking our team from updating to the latest version of Xcode.
Steps to Reproduce: 1. Download the attached Strings.swift file
2. Run the following command:
time swiftc -O Strings.swift \
-o output.o \
-sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.2.sdk \
-target arm64-apple-ios12.2
Expected Results: File compiles within seconds.
Actual Results: Wait 30+ minutes for the file to compile.
Version/Build: Xcode 10.2 and 10.2.1
Comments
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