Cache Is the King! Create Cache in AWS Lambdas
summary
Shows how adding an in-memory cache to AWS Lambdas in Python can cut latency and cost for short, frequent API work by using decorators rather than Redis/ElastiCache for rapid, small-data caching. Demonstrates the lru_cache decorator, explains that the cache lasts while Lambda is warm (typically useful for ~10–15 minutes), gives code for clearing and using a uuid as key to prevent cross-tenant leakage, and warns about memory limits so keep entries small.
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