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‫So we have learned a lot on Lambda

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‫in this section

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‫and that was necessary going to the exam.

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‫So just some final words of wisdom before we leave you.

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‫So best practices.

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‫You need to perform heavy duty work

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‫outside of your function handler

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‫to minimize the amount of time your handler will run for.

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‫So that means that you need to connect your databases

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‫outside of your function handler,

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‫initialize the AWS SDK outside of your handler again

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‫and building any dependencies or datasets,

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‫again, outside of your function handler.

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‫You should use environment variables

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‫for anything that is going to be changing over time.

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‫So your database connection strings,

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‫your S3 bucket name, et cetera, et cetera.

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‫Do not put these values in your code.

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‫And for password and sensitive values,

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‫you can encrypt these environment variables with KMS.

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‫Next, you should minimize your deployment package size

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‫to its runtime necessities.

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‫So that means that if your function is too big,

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‫please break it down.

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‫Also, remember the Lamda limits

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‫for your package size and so on.

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‫And if you need to reuse some libraries,

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‫think of leveraging Lambda layers.

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‫And finally, avoid recursing code.

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‫Okay, never have a Lambda function call itself.

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‫That is going to be a disaster

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‫and is going to be very expensive for you.

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‫Okay, so that's it for this lecture.

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‫I hope you liked it and I will see you in the next lecture.