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Pre-rendering at Compile Time

  • By Gcore
  • August 13, 2026
  • 1 min read
Dark illustration showing web and mobile development with coding elements.

The trick is to do all the hard work at build time. With Rust's build scripts, you can generate your HTML during compilation and embed it directly into the Wasm binary.

The Pattern

Create a build.rs file that renders the HTML and writes it to a generated Rust file:

 

Include the Generated HTML

At runtime, include the generated file and return the embedded HTML from your request handler:

 

 Tip: This keeps the template engine out of your Wasm binary, resulting in a smaller artifact with no runtime rendering cost.

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