https://krtffl.dev/tags/wasm/ Recent content in wasm on krtffl.dev Hugo -- gohugo.io en © [krtffl](https://krtffl.dev) Mon, 20 Apr 2026 00:00:00 +0000 https://krtffl.dev/posts/rust-wasm-canvas-charts/ Mon, 20 Apr 2026 00:00:00 +0000 https://krtffl.dev/posts/rust-wasm-canvas-charts/ <p>lights out. one car jumps another off the line, and forty laps later a strategist on the pit wall wins the whole race with a single number: <em>when to box</em>. i don&rsquo;t have a pit wall. i have a laptop, a <a href="https://openf1.org" target="_blank" rel="noopener noreferrer">free public api ↗</a> , and an unreasonable urge to see tire strategy as a <em>picture</em> instead of a table of lap times.</p> <p>so i wanted a chart. the boring way to get one is <code>npm install</code> something with a d3 buried in its dependency tree, feed it an array, and move on with my life. i did not do the boring way. i drew the whole thing in rust, compiled it to webassembly, and painted it onto a <code>&lt;canvas&gt;</code> pixel by pixel with zero javascript charting libraries in the bundle.</p>