Start-AzureStorageBlobCopy vs AzCopy: which one takes lesser time

Question

I need to move vhds from one subscription to other. I would like to know which one is better option for the same: Start-AzureStorageBlobCopy or AzCopy

Answer 1

They don't take the same time.

I've tried to copy from one account to another and have a huge difference.

Start-AzureStorageBlobCopy -SrcBlob $_.Name -SrcContainer $Container -Context $ContextSrc -DestContainer $Container -DestBlob $_.Name -DestContext $ContextDst --Verbose

This takes about 2.5 hours.

& .\AzCopy.exe /Source:https://$StorageAccountNameSrc.blob.core.windows.net/$Container /Dest:https://$StorageAccountNameDst.blob.core.windows.net/$Container /SourceKey:$StorageAccountKeySrc /DestKey:$StorageAccountKeyDst /S

This takes several minutes.

I have about 600 Mb and about 7000 files here.

Elapsed time:            00.00:03:41
Finished 44 of total 44 file(s).
[2017/06/22 17:05:35] Transfer summary:
-----------------
Total files transferred: 44
Transfer successfully:   44
Transfer skipped:        0
Transfer failed:         0
Elapsed time:            00.00:00:08
Finished 345 of total 345 file(s).
[2017/06/22 17:06:07] Transfer summary:
-----------------
Total files transferred: 345
Transfer successfully:   345
Transfer skipped:        0
Transfer failed:         0
Elapsed time:            00.00:00:31

Do anyone know why it's so different?