fix web performance

web/Cargo.toml

@@ -31,6 +31,8 @@ tracing-wasm = "0.2"
 console_log = "1.0"
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
+js-sys = "0.3"
+web-sys = { version = "0.3", features = ["Window", "Performance"] }
 universal-time = { git = "https://github.com/shadowylab/universal-time" }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]

web/src/lib.rs

@@ -11,13 +11,21 @@ struct CustomTimeProvider;
 
 impl WallClock for CustomTimeProvider {
     fn system_time(&self) -> SystemTime {
-        SystemTime::from_unix_duration(instant::Duration::from_secs(0))
+        // Browser wall clock: milliseconds since the Unix epoch.
+        let millis = js_sys::Date::now();
+        SystemTime::from_unix_duration(instant::Duration::from_millis(millis as u64))
     }
 }
 
 impl MonotonicClock for CustomTimeProvider {
     fn instant(&self) -> Instant {
-        Instant::from_ticks(instant::Duration::from_secs(0))
+        // `performance.now()` is monotonic; fall back to the wall clock if
+        // it's unavailable.
+        let millis = web_sys::window()
+            .and_then(|window| window.performance())
+            .map(|performance| performance.now())
+            .unwrap_or_else(js_sys::Date::now);
+        Instant::from_ticks(instant::Duration::from_millis(millis as u64))
     }
 }
 

web/www/vite.config.js

@@ -10,11 +10,11 @@ export default defineConfig({
     viteStaticCopy({
       targets: [
         {
-          src: path.resolve(__dirname, "../../../assets/icons"),
+          src: path.resolve(__dirname, "../../assets/icons"),
           dest: "assets",
         },
         {
-          src: path.resolve(__dirname, "../../../assets/brand"),
+          src: path.resolve(__dirname, "../../assets/brand"),
           dest: "assets",
         },
       ],
@@ -25,7 +25,7 @@ export default defineConfig({
         server.middlewares.use(
           "/assets",
           (req, res, next) => {
-            const assetsPath = path.resolve(__dirname, "../../../assets");
+            const assetsPath = path.resolve(__dirname, "../../assets");
             const filePath = path.join(
               assetsPath,
               req.url.replace("/assets", ""),