Which is the best load testing tool for serverless architecture?

Question

Anything otherthan Jmeter tool

Answer 1

In absolute majority of cases you don't need to test the serverless application itself as it is being run by 3rd-party provider, i.e. Microsoft or Amazon

The only thing it makes sense to do is to perform analysis of the "function" implementation in order to identify that it is well developed from code perspective:

• uses optimal algorithms
• doesn't have obvious memory leaks
• uses underlying infrastructure efficiently from multithreading perspectice

All this can be done using source code analysis and profiling tools

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If your question is broader and you're looking for a load testing tool other than JMeter - check out Open Source Load Testing Tools: Which One Should You Use? article which describes alternatives including but not limited to:

• Grinder
• Gatling
• Tsung

However "classic" load testing tools are not applicable to FAAS applications