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For whatever reason when I try to upload a file to S3 using AWSS3TransferManager it is incredibly slow, both in the iOS simulator and on device (iPhone and iPad). I'm on a 1Gbps fiber connection, so that shouldn't be it, and I'm experiencing the same speeds on LTE.

Starting out at about 200KB/s and then it slows to a crawl at around 10-20KB/s.

Any idea what might be causing this? Anybody else have the same issues with AWSS3TransferManager?

Christian A. Strømmen
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  • It looks like the client automatically handles multipart uploads but the minimum file size is 5MB. How large are the files you're testing against? – Dave Maple Jan 14 '17 at 20:19
  • @DaveMaple they're all 500MB+. EDIT: Actually some are 20-100MB, but I see the same no matter which size the files are. – Christian A. Strømmen Jan 14 '17 at 21:02
  • A few things A) What version of the SDK are you using? B) Does this happen if it's only a single large file (i.e. Waiting for one to finish before starting the next) C) Does this happen if you are only uploading a bunch of files under 5MB or under 20MB? – WestonE Jan 18 '17 at 01:13
  • @ChristianA.Strømmen Are you able to fix this issue? – Aravind Bhuvanendran Jun 09 '17 at 09:20

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