Azure Functions: Cold Start Duration per Language

The following chart shows the typical range of cold starts in Azure Functions, broken down per language. The darker ranges are the most common 67% of durations, and lighter ranges include 95%.

The charts below give the distribution of cold start durations per runtime version and supported programming language. They all apply to V2 and Windows, unless stated otherwise.

All charts have the same horizontal scale (0-20 sec) to make them easily comparable.

C#:

JavaScript:

Java:

Python (Linux):

PowerShell:

Go back to Cold Starts in Azure Functions.