Use of .some() rather then .filter() to improve efficiency

lib/dialects/abstract/query.js

@@ -427,9 +427,9 @@ module.exports = (function() {
       for (var attrName in row) {
         if (row.hasOwnProperty(attrName) && (attrName !== calleeTableName)) {
           existingEntry[attrName] = existingEntry[attrName] || []
-          var attrRowExists = existingEntry[attrName].filter(function(attrRow) {
+          var attrRowExists = existingEntry[attrName].some(function(attrRow) {
             return Utils._.isEqual(attrRow, row[attrName])
-          })[0]
+          })
           if (!attrRowExists) {
             existingEntry[attrName].push(row[attrName])
           }