Would app.use( ) create a bottleneck

So let's say each API does some check for authorization and checks if your req.body does not have any null values. Instead of writing these explicitly in each API, if I write it in app.use( ), would it create a choke point?Would each request wait here till the previous one does not move along? I guess the app.use ( ) should not "await" right? It should only operate on callbacks or on then( )

Submitted August 01, 2019 at 06:18AM by kjroger94