Final answer:
After uploading code to AWS Lambda, the function is typically ready within seconds. A 'cold start', which occurs upon first invocation or after a period of inactivity, may cause a slight delay. Subsequent invocations are usually faster.
Step-by-step explanation:
After uploading your code to AWS Lambda, the function you created is typically ready to be called within seconds. AWS Lambda is designed for quick deployments and executions, so there's usually a minimal delay between the moment you finish uploading your code and the time your function becomes available for invocation. However, if you're deploying as part of a larger application stack with additional AWS services, or using continuous integration/continuous deployment (CI/CD) pipelines, the overall deployment time could be influenced by those additional processes.
Keep in mind that if this is the first time you're invoking your Lambda function, or if it hasn't been used for a while, there might be a slight delay due to 'cold start'. During a 'cold start', AWS Lambda has to initialize a new instance of your function, which includes setting up the runtime environment and executing any initialization code you have. Subsequent invocations are generally faster, as they can use the same initialized environment, unless the function scales up in response to increased concurrency demands.