How I Improved Email Rendering Performance 15x Using Rust + WebAssembly (Next.js 16 Devlog)

📰 Dev.to · Sanjay Kumar Sah

Improve email rendering performance by 15x using Rust and WebAssembly in a Next.js application

advanced Published 13 Feb 2026
Action Steps
  1. Build a WebAssembly module using Rust to handle email rendering
  2. Integrate the WebAssembly module into a Next.js application using the WebAssembly API
  3. Configure the Next.js application to use the WebAssembly module for email rendering
  4. Test the performance of the email rendering functionality using benchmarking tools
  5. Compare the performance of the WebAssembly module with the original implementation
  6. Optimize the WebAssembly module for better performance using Rust optimization techniques
Who Needs to Know This

Developers and engineers working on SaaS products with email rendering functionality can benefit from this approach to improve performance and scalability. The use of Rust and WebAssembly can also be applied to other areas of the application, such as data processing and analytics.

Key Insight

💡 Using Rust and WebAssembly can significantly improve the performance of email rendering in a SaaS application

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💡 Improve email rendering performance by 15x using Rust + WebAssembly in Next.js!

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I decided to do something scary: Build a SaaS product in public, from scratch, sharing every win and...
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