Speed up your lambda functions


AWS Lambda is a popular serverless computing service offered by Amazon Web Services (AWS). It allows developers to run code in response to certain events or triggers, without the need to provision or maintain servers.

One of the key benefits of using AWS Lambda is its ability to scale automatically and handle high levels of concurrency. However, there are several factors that can impact the performance of your Lambda functions, and it’s important to understand how to optimize them to ensure that they run smoothly and efficiently.

Here are some tips to improve the performance of your AWS Lambda functions:

Use the right memory size:
AWS Lambda automatically allocates CPU and memory resources based on the amount of memory that you allocate to your function. Allocating more memory to your function can improve its performance, but it also increases the cost of running the function. It’s important to find the right balance and choose a memory size that is sufficient for your function’s needs without being unnecessarily large.

Enable Provisioned Concurrency:
Provisioned Concurrency is a feature that allows you to warm up your functions before they are needed, so that they can respond more quickly when they are invoked. This can be especially useful if your functions are used infrequently but need to be ready to respond quickly when they are called.

Use Async/Await:
If your function makes use of asynchronous programming, consider using the async/await pattern to improve performance. Async/await allows you to write asynchronous code that reads like synchronous code, which can make your functions easier to write and debug.

Optimize cold start times:
Cold start times refer to the time it takes for a new instance of your function to be initialized and start running. This can be a significant factor in the performance of your functions, especially if they are invoked infrequently. To minimize cold start times, you can consider using Provisioned Concurrency, as well as optimizing your code to minimize the amount of time it takes to start up.

Use the appropriate runtime:
AWS Lambda offers a variety of runtime options, including support for languages such as Node.js, Python, and Go. Choosing the right runtime for your function can have a significant impact on its performance. For example, some runtimes may be more efficient at executing certain types of tasks, so it’s worth considering which runtime is best suited for your specific needs.

Enable compression:
If your function’s response payload is large, consider enabling compression to reduce the amount of data that needs to be transferred. This can help to improve the performance of your function, especially if it is being invoked over a network connection with limited bandwidth.

Use a cache:
If your function performs the same calculations or makes the same API calls repeatedly, consider using a cache to store the results. This can help to improve the performance of your function by reducing the number of expensive calculations or API calls that it needs to make.

Use environment variables:
Instead of hardcoding values into your function code, consider using environment variables to store configuration data. This can make it easier to update your function without changing its code, and can also help to improve performance by reducing the amount of code that needs to be executed.

Monitor and debug your functions:
By using tools like AWS CloudWatch, you can monitor the performance of your functions and identify any issues that may be impacting their performance. You can also use debugging tools like AWS X-Ray to identify and troubleshoot problems with your functions.

Use the right resources:
If your function requires additional resources like databases or message queues, choose the right type and size of these resources to ensure that they are able to support the needs of your function. For example, if you are using a database, consider using a database engine that is optimized for the type of workload that your function is performing.

By following these tips, you can improve the performance of your AWS Lambda functions and ensure that they are able to handle high levels of concurrency and respond quickly to requests.

About the Author

Kumaragurubaran is a highly competent and results oriented software developer with around 4 year expertise in Software development with Rich exposure to Software Development Lifecycle. He is an avid biker, trekker and marathoner. Proven ability in high scale web application development. Skilled in algorithm design, problem solving and complexity analysis.

About KBX Digital

At KBX Digital, we use server-less technology to auto-scale micro-services to serve millions of customers.



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