[Perf] isCreateElement: improve performance for rules using isCreateElement

Author: golopot

lib/util/isCreateElement.js

@@ -10,13 +10,12 @@ const isDestructuredFromPragmaImport = require('./isDestructuredFromPragmaImport
  * @returns {Boolean} - True if node is a createElement call object literal, False if not.
 */
 module.exports = function isCreateElement(node, context) {
-  const pragma = pragmaUtil.getFromContext(context);
   if (
     node.callee
     && node.callee.type === 'MemberExpression'
     && node.callee.property.name === 'createElement'
     && node.callee.object
-    && node.callee.object.name === pragma
+    && node.callee.object.name === pragmaUtil.getFromContext(context)
   ) {
     return true;
   }