We are using the Java SDK to first create an upload session, then upload the document. We are currently uploading in chunks of 10 MB (as recommended by public documentation: https://learn.microsoft.com/en-us/graph/api/driveitem-createuploadsession?view=graph-rest-1.0), but we are noticing that each chunk takes ~10 seconds.
Based on what is logged by the SDK, it seems like the time is taken up by the network.
Here is a snippet of logs when uploading a chunk:
13-Jan-2020 02:41:23.503 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Starting to send request, URL https://obfuscated.com/sites
/blur/_api/v2.0/drives/12345/items/12345/uploadSession?guid='blur'&path='blur.docx'&overwrite=False&rename=True&dc=0&tempauth=blur
13-Jan-2020 02:41:23.504 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Request Method PUT
13-Jan-2020 02:41:23.504 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Sending byte[] as request body
13-Jan-2020 02:41:33.018 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Response code 202, Accepted
13-Jan-2020 02:41:33.018 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug StatefulResponse is handling the HTTP response.
13-Jan-2020 02:41:33.018 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Chunk bytes has been accepted by the server.
13-Jan-2020 02:41:33.019 INFO [http-DS0-1364-37-1578883281173] com.microsoft.graph.logger.DefaultLogger.logDebug Deserializing type UploadSession
Is this expected? Is there any way to perform the upload faster?
