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Switch production builds from -Os to -Oz to avoid 25 MB deployment limit #4309

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Merged
Keavon merged 1 commit into from
Jul 4, 2026
+3 −1
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Switch production builds from -Os to -Oz to avoid 25 MB deployment limit #4309

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4 changes: 3 additions & 1 deletion tools/cargo-run/src/frontend.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,9 @@ pub fn build_wasm_steps(release: bool, native: bool) -> Vec<Expression> {

if release {
let wasm_file = pkg_dir.join(format!("{OUT_NAME}_bg.wasm"));
steps.push(cmd!("wasm-opt", "-Os", "-g", &wasm_file, "-o", &wasm_file));
// `-Oz` (size over speed) keeps us under Cloudflare Pages' 25 MiB single-file cap.
// `-g` preserves the name section, which the panic hook reads at runtime to spot node-graph panics (see wrapper `lib.rs`).
steps.push(cmd!("wasm-opt", "-Oz", "-g", &wasm_file, "-o", &wasm_file));
}

steps
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