  FaaS (Function as a Service) allows developers to upload and execute code in
the cloud without managing servers. FaaS offerings from leading public cloud
providers are based on system microVM or application container technologies
such as Firecracker or Docker. In this paper, we demonstrate that lightweight
high-level runtimes, such as WebAssembly, could offer performance and scaling
advantages over existing solutions, and could enable finely-grained
pay-as-you-use business models. We compared widely used performance benchmarks
between Docker native and WebAssembly implementations of the same algorithms.
We also discuss the barriers for WebAssembly adoption in serverless computing,
such as the lack of tooling support.
