Why upload speed slow and below 3mbps?

[fcdont]

Question
I have a dedicated server with 1gbps port and pretty high end spec, I expect the upload speed would be like 10/20mbps, but the upload speed only below 3mbps like 2.3 to 2.5mbps. When i try a non tus file upload, it reaches to 15-35mbps. Im using nginx as reverse proxy for both tus server software and my react app. I just want to know if there is any configurations or tus upload has limit?

Setup details
Please provide following details, if applicable to your situation:

• Runtime environment:
  Node.js and Browser

• Used tus-js-client version:
  Using the latest version

• Used tus server software:
  tusd

[Acconut]

Tus itself does not have a speed limit, it's just a protocol. Debugging performance bottlenecks is impossible without more detailed information and your system and used configuration. Here are some pointers:

• Missing Nginx configuration can throttle uploads: Given nginx configuration slows down uploads over https tusd#1106
• When uploading to S3, CPU can be a limiting factor: s3store: Add tools for debugging bottlenecks tusd#924