4x speed-up of showMatchesOnScrollbar

at the cost of a marginally reduced accuracy when line wrapping is enabled, but the difference shouldn't be more than a few pixels, presumably

edit/match-highlighter-helper.js

@@ -5,8 +5,10 @@
   const HL_APPROVED = 'cm-matchhighlight-approved';
   const originalAddOverlay = CodeMirror.prototype.addOverlay;
   const originalRemoveOverlay = CodeMirror.prototype.removeOverlay;
+  const originalMatchesOnScrollbar = CodeMirror.prototype.showMatchesOnScrollbar;
   CodeMirror.prototype.addOverlay = addOverlay;
   CodeMirror.prototype.removeOverlay = removeOverlay;
+  CodeMirror.prototype.showMatchesOnScrollbar = matchesOnScrollbar;
   return;
 
   function shouldIntercept(overlay) {
@@ -49,6 +51,16 @@
       };
       overlay.token = tokenHook;
     }
+
+    if (this.options.lineWrapping) {
+      const originalGetOption = CodeMirror.prototype.getOption;
+      CodeMirror.prototype.getOption = function (option) {
+        return option !== 'lineWrapping' && originalGetOption.apply(this, arguments);
+      };
+      setTimeout(() => {
+        CodeMirror.prototype.getOption = originalGetOption;
+      });
+    }
   }
 
   function tokenHook(stream) {
@@ -117,4 +129,9 @@
     this.showMatchesOnScrollbar = helper.showMatchesOnScrollbar;
     helper.query = query;
   }
+
+  function matchesOnScrollbar(query, ...args) {
+    query = new RegExp(/(?:^|[^\w.#\\-])/.source + query.source.slice(2, -2) + /(?:[^\w.#\\-]|$)/.source);
+    return originalMatchesOnScrollbar.call(this, query, ...args);
+  }
 })();