试试看吧

package.json

@@ -4,7 +4,8 @@
   "description": "",
   "main": "zb.js",
   "scripts": {
-    "zb": "node $NODE_DEBUG_OPTION zb.js"
+    "zb": "node $NODE_DEBUG_OPTION zb.js",
+    "testSpeed": "node $NODE_DEBUG_OPTION testSpeed.js"
   },
   "author": "",
   "license": "ISC",

testSpeed.js

+const depthByRest = require('./zb');
+
+let total = 0;
+let total2 = 0;
+let time = 0;
+
+
+setInterval(()=>{
+  run();
+}, 100 );
+
+function run() {
+  const before = Date.now();
+  depthByRest((err, data) => {
+    if (err) {
+      console.error(err);
+      return;
+    }
+    const after = Date.now();
+    total += after - before;
+    time ++;
+    total2 += ((after - before) - total / time) * ((after - before) - total / time);
+    console.log('平均值：' + (total / time) + ' 标准差：' + Math.sqrt(total2 / time));
+  });
+}
+
+run();
\ No newline at end of file

zb.js

 const stream = 'wss://api.zb.com:9999/websocket';
 const WebSocket = require('ws');
+const request = require('request');
 const crypto = require('crypto');
 const options = {};
 const observerSymbol = ["btcusdt", 'ethusdt', 'ethbtc', 'eosbtc'];
@@ -80,4 +81,24 @@ function subscribe() {
   });
 }
 
+function depthByRest(callback) {
+  let opt = {
+    url: "http://api.zb.com/data/v1/depth?market=btc_usdt&size=10",
+    method: "GET",
+  };
+  request(opt, (error, response, body) => {
+    if ( !callback ) return;
+
+    if ( error )
+      return callback( error, {} );
+
+    if ( response && response.statusCode !== 200 )
+      return callback( response, {} );
+
+    return callback( null, JSON.parse(body) );
+  });
+}
+
 subscribe();
+
+module.exports = depthByRest