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[SR-6881] Saving Data from URLSession to disk and NSCache causes double the memory #4260

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swift-ci opened this issue Jan 31, 2018 · 1 comment
Open

[SR-6881] Saving Data from URLSession to disk and NSCache causes double the memory #4260

swift-ci opened this issue Jan 31, 2018 · 1 comment
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bug Foundation Leak

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@swift-ci
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Previous ID SR-6881
Radar https://bugreport.apple.com/web/?problemID=37082760
Original Reporter Jay18001 (JIRA User)
Type Bug

Attachment: Download

Environment

iOS 11.2, simulator and iPhone X

Xcode 9.2 (9C40b)

macOS 10.12.6 (16G1114)

Additional Detail from JIRA
Votes 0
Component/s Foundation
Labels Bug, Leak
Assignee None
Priority Medium

md5: 2870ec4b8f985c3e6bf0c0086b771c40

Issue Description:

When a 10mb file is downloaded using URLSession and written to disk and saved to NSCache the memory goes up by 20mb.

Using the following causes the leak:

do {
     try data.write(to: fileUrl)
} catch {
     print(error)
}

However doing this does not cause the leak:

(data as NSData).write(to: fileUrl, atomically: true)

It happens every time the button is pressed in the attached example project
@belkadan
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belkadan commented Feb 1, 2018

@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@belkadan @swift-ci