细节优化

src/util.js

@@ -1,3 +1,20 @@
+export const debounce = (fn, delay = 300) => {
+  let timer = null;
+  return async (...args) => {
+    if (timer) clearTimeout(timer);
+    return new Promise((resolve) => {
+      timer = setTimeout(async () => {
+        try {
+          const result = await fn(...args);
+          resolve(result);
+        } finally {
+          timer = null;
+        }
+      }, delay);
+    });
+  };
+};
+
 export function renderScores(ctx, arrows = []) {
   let rowIndex = 0;
   arrows.forEach((item, i) => {