feat: fix a perf issue when searching with a large number of Chinese words

fixes #312

Author: weareoutman

docusaurus-search-local/src/client/utils/smartQueries.ts

@@ -81,6 +81,17 @@ export function smartQueries(
     refinedTerms = terms.slice();
   }
 
+  const MAX_TERMS = 10;
+  if (refinedTerms.length > MAX_TERMS) {
+    // Sort terms by length in ascending order.,
+    // And keep the top 10 terms.
+    refinedTerms.sort((a, b) => a.length - b.length);
+    refinedTerms.splice(MAX_TERMS, refinedTerms.length - MAX_TERMS);
+
+    terms.sort((a, b) => a.length - b.length);
+    terms.splice(MAX_TERMS, terms.length - MAX_TERMS);
+  }
+
   // Also try to add extra terms which miss one of the searched tokens,
   // when the term contains 3 or more tokens,
   // to improve the search precision.