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[SR-11944] Swift Frontend emits too many system framework dependencies #54364

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robinkunde opened this issue Dec 11, 2019 · 0 comments
Closed

[SR-11944] Swift Frontend emits too many system framework dependencies #54364

robinkunde opened this issue Dec 11, 2019 · 0 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@robinkunde
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Previous ID SR-11944
Radar None
Original Reporter @robinkunde
Type Bug
Status Resolved
Resolution Duplicate

Attachment: Download

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: 74c01e52ff2e7bce92e9e79c56eaa5bd

duplicates:

  • SR-11927 Swift compiler chokes when incrementally building one file out of many

relates to:

  • SR-11945 Swift frontend is too conservative when emitting dependencies
  • SR-11927 Swift compiler chokes when incrementally building one file out of many

Issue Description:

Starting with Xcode 11.x, the make-style dependency files (*.d) emitted by the frontend contain a greatly increased amount of information related to system frameworks.

In the example project attached, the size of the .d emitted for each Swift file increased from 9kb (Xcode 10.3) to 639kb (Xcode 11.3). Since the exact same information is emitted for every Swift file (SR-11945), this can lead to a significant regression in compile times.
@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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@robinkunde