benchmark without validation by default (#3901)

test/benchmark.js

@@ -10,7 +10,7 @@ var zlib = require("zlib");
 var args = process.argv.slice(2);
 if (!args.length) args.push("-mc");
 args.unshift("bin/uglifyjs");
-args.push("--validate", "--timings");
+args.push("--timings");
 var urls = [
     "https://code.jquery.com/jquery-3.4.1.js",
     "https://code.angularjs.org/1.7.8/angular.js",

test/release/benchmark.js

@@ -9,6 +9,6 @@ require("./run")([
     "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
 ].map(function(options) {
     var args = options.split(/ /);
-    args.unshift("test/benchmark.js");
+    args.unshift("test/benchmark.js", "--validate");
     return args;
 }));