Optimizing AWS Lambda Performance: Balancing Power and Cost

The author conducted performance tests on an AWS Lambda function, aiming to optimize execution speed and cost. They utilized AWS Lambda Power Tuning to test different memory allocations: 128 MB, 256 MB, 512 MB, and 1024 MB. Postman's Performance Testing feature was used to simulate concurrent requests and measure key metrics. The 128 MB configuration exhibited the slowest response times, with latency exceeding a second under load. 256 MB provided improvement, but some lag remained at higher concurrency levels. 512 MB delivered a significant performance boost, reducing response time to around 505 ms. 1024 MB offered the best performance, with average response time down to 295 ms and higher throughput. All tests completed without errors, confirming stable performance across the varied configurations. The author concluded that increased memory improves speed but also raises costs, requiring a performance-cost balance. They determined that 512 MB was a good compromise, while 1024 MB was best for latency-sensitive cases.