What is async?

async implies

• events

• or

• messages

Distinction: events vs messages

Why async?

improves responsiveness

(not performance - Distinction: responsiveness vs performance)

async usually works well in happy path, but get's more complicated in the unhappy path...

happy path -> works well

unhappy path: eg."comment uses a word that is not allowed"

• new user flow:

• • send email?

  • notification to user?

• automate correction

• • censor that word *****