perf: one more quick improvement

Author: vkarpov15

lib/types/array/methods/index.js

@@ -374,7 +374,9 @@ const methods = {
       if (val != null && utils.hasUserDefinedProperty(val, '$each')) {
         atomics.$push = val;
       } else {
-        if (val.length < 10000) {
+        if (val.length === 1) {
+          atomics.$push.$each.push(val);
+        } else if (val.length < 10000) {
           atomics.$push.$each.push(...val);
         } else {
           for (const v of val) {