How to get and send file fast?

[dalisoft]

Hi.
I want use uWebSockets.js only without nginx proxy so i need to serve static files.

I have three ways to do it:

• using fs.createReadStream + implementing pipe stream
• using fs.readFile() inside route function
• using fs.readFile(), cache to memory and use that

First variant sounds not bad, second variant is very RAM + CPU hungry at every request. Third variant is could be very RAM hungry if 10-20 file could be bigger than 250-300Kb. If any file which size is >1GB happens, it may crash or lag server.

Is there any better way? Maybe any trick to use Linux sendfile feature like nginx uses?
Could be nice to see this feature in uWebSockets.js but i think it's out of scope for this project.

[dalisoft]

Example repo is created and for very small files seems third variant is fastest and memory hungry
https://github.com/nanoexpress/static-serve-benchmark

[dalisoft]

Serving itself slow task so caching less-sized files and streaming large files (100+ MB) is good solution if routing directly from uWebSockets.js, if not, using nginx is proper solution