How to improve File Upload Performance

I have installed ERPNext in an Ubuntu 16.04 Virtual Machine. I am experiencing slow file upload issue. My Virtual Machine is having network download/upload speed near to 1Gbps. But, file upload speed is very slow while using ERPNext. Do I need to do any extra configuration settings to improve the file upload performance?

Note: The internet speed at the client side is also very good. ie, net speed at both end is very good.

No extra configuration is needed for this purpose. Please check the log browser console > network for the details analysis, and share here if possible…