Cold start
InfrastructureThe delay when no instance is running yet.
When a serverless function has no live instance, one must be created before your code runs. That startup delay is the price of paying nothing while idle, and it lands on whichever unlucky visitor arrives first.
See also Serverless, Stateless
Serverless
InfrastructureYou ship a function; something else runs it.
The platform decides when to run your code, how many copies to run, and when to discard them. Costs nothing while idle, scales without thought, and gives you no persistent memory between requests.
See also Cold start, Stateless, Container
Timeout
InfrastructureA hard limit on how long something may take.
Enforced by browsers, proxies, and serverless platforms. Work that exceeds one is killed partway through, leaving whatever it was doing half-finished.
See also Background job, Retry