Interesting test. Functional language F# was the fastest for tested cloud functions :)
Comparing AWS Lambda performance of Node.js, Python, Java, C# and Go @ acloud.guru
code used for testing:
yunspace/lambda-platform-perf-comparison
base code for testing:
theburningmonk/lambda-platform-perf-comparison @ GitHub
related:
yunspace/serverless-golang: AWS Lambda Go functions using Serverless Framework and Python shim @ GitHub