[prirun]

I'm author of HashBackup and regularly run performance comparisons between object storage services. While I agree than S3 performance is generally better than B2, I personally have not seen a 10x difference in egress performance.

Here's a test I recently ran comparing S3, B2, and Storj. The test uploads a 700MB backup, downloads it and rebuilds a database, then removes it. The test was run on a small 1 CPU, 512M Vultr VPS.

  S3 upload: 20.6s
  S3 download: 26s
  S3 remove: 1.2s

  B2 upload: 28.2s
  B2 download: 28.7s
  B2 remove: 4.0s

  Storj upload: 34.7s
  Storj download: 75.3s
  Storj remove: 20.6s

B2 does have higher latency than S3, so for short operations like removing objects, S3 has higher performance. If your egress load is for a lot of small objects, I could see B2 being a lot slower. This shows up in my tests where removing 14 backup files is more than 3x slower on B2 than on S3. But even for this, I've never seen 10x slower.

A footnote: the Storj tests are with a new driver so those numbers are preliminary results.