Hello

Initially I've started uploading files into Kinveys backend environment using REST API. That always took me several seconds. I thought the problem might be caused by my backend server (doing the upload).

Now using your HTML5 API (3.1.2) I experience the same performance problem. The central upload operation is: 

var promise = Kinvey.Files.upload(fileContent, metaData)
      .then(function (file) {...

I have done some tests with a 5KB png file. I live in middle of Europe and use a 150MMBit Internet connection (50MBit upload). Further more I've tested on different browsers: Firefox, Chrome, Safari (all latest versions). 

If you have a look at the attached screenshot (browser network output):

As you can see it takes several seconds (twice) for www.googleapis.com that probably is invoked by the HTML5 Kinvey API. Based on different tests those calls take 2-8 seconds. The fourth one in the list is string upload into a collection which is always fast).

So my questions are: Do you (at Kinvey) experience the same time (several seconds) on uploading a very small file? Is this normal or are there options I can improve upload speed?

The funny thing: Having the Kinvey console opened in a separate tab I see the upload file there "right away" after upload start but it still takes several seconds the callback (.then(...) tells me the file was successfully uploaded.

Regards

Hi Martin

Yes, that helped, thank you! The process "behind the scene" is now clearer to me. I was guessing something like that since I see uploaded files/data very quickly. That confirms me as well that I'm not doing wrong anything. I used a small file to make sure the file size is not the problem but I'm a ware there is a lot more in the background than "just" a file will be uploaded.

Regards