Are Your AWS Lambda Functions Leaking Money? The Hidden Cost of CloudWatch REPORT Logs

TL;DR — Every AWS Lambda invocation emits a REPORT line to CloudWatch Logs. These ~200-byte lines look free, but at scale they routinely account for 20–60% of a serverless platform’s CloudWatch Logs bill — sometimes more than the Lambda compute itself. The fix is not “log less” in your code. It is tuning system-level logging, […]