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AXA Belgium’s Journey to Running .NET Web APIs on AWS Lambda

.NET on AWS Blog



AXA Belgium conducted a comprehensive proof of concept (PoC) to evaluate running .NET Web APIs on AWS Lambda, focusing on three key considerations:

  • Minimizing development effort for migration
  • Maintaining compatibility with .NET Web API standards
  • Preserving application performance

Key findings from their testing include:

  • Native AOT compilation in .NET 8 achieved 83% improvement in cold starts
  • Potential to reduce memory allocation and save up to 50% in costs
  • AWS Lambda SnapStart showed mixed performance benefits depending on implementation
  • x86 architecture performed better than ARM for their specific use case

The team recommends starting with small, non-critical APIs to build confidence and gradually migrating more complex applications to serverless architectures.



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