slow export to photo library

apple bug report.txt

Mark Essel10-Aug-2015 02:41 PM

Summary:
The issue specifically arises when a user has iCloud photo backup enabled, and attempts to export a substantial video to the photo library (the longer the video the longer the delay, exponentially slower)

https://gist.github.com/victusfate/8969a70e82c00ae448a7

Steps to Reproduce:
1. turn on icloud photo backup
2. run the attached code snippet in an app for a given videoURL
3. when it takes tens of seconds or minutes for a 1min+ video you have recreated the issue

Expected Results:
I expect the changeRequest to take seconds (max dependent on file size) to add an existing local video to the local photo library

Actual Results:
It can sometimes take minutes to add a local video to the photo library

Version:
Version 6.4 (6E35b)

Notes:


Configuration:
code snippet when run on device (dev mode is fine)

Attachments:

slowCreationRequest.swift

   func exportAssetToPhotoLibrary(videoURL: NSURL, _ exportedAsset: (localIdentifier: String) -> Void) {
        var localIdentifier = ""
        var startTime = NSDate.timeIntervalSinceReferenceDate()
        PHPhotoLibrary.sharedPhotoLibrary().performChanges({
            let assetRequest = PHAssetChangeRequest.creationRequestForAssetFromVideoAtFileURL(videoURL)
            let assetPlaceholder = assetRequest.placeholderForCreatedAsset
            localIdentifier = assetPlaceholder.localIdentifier
        },
        completionHandler: { success, error in
                var elapsedTime: NSTimeInterval = NSDate.timeIntervalSinceReferenceDate() - startTime
                NSLog("exported cameo video to photo library \(elapsedTime)")
                exportedAsset(localIdentifier: localIdentifier)
        })
    }