src: move speed-tester.js to utils/

src/core/hub.js

@@ -12,8 +12,7 @@ import uniqueId from 'lodash.uniqueid';
 import { Config } from './config';
 import { Relay } from './relay';
 import { MuxRelay } from './mux-relay';
-import { SpeedTester } from './speed-tester';
-import { dumpHex, logger } from '../utils';
+import { SpeedTester, dumpHex, logger } from '../utils';
 import { http as httpProxy, socks, tcp } from '../proxies';
 
 export const MAX_CONNECTIONS = 50;

src/utils/index.js

@@ -5,4 +5,5 @@ export * from './dns-cache';
 export * from './string';
 export * from './validator';
 export * from './advanced-buffer';
+export * from './speed-tester';
 export * from './logger';