I'm extremely surprised to hear that. I know that there can be implementation differences, but on the level of application-code, this stuff is super simple. Create a javascript function then upload it. Not really much else to it, so I can't fathom what the difference is between your project and my own.

We're not doing anything crazy, it's just a basic CRUD application with minimal data (entire DB is less than 100MB at this point). And yet we're seeing constant, constant lags of several seconds for almost every single request. I can't explain it.