perf trace

src/index.tsx

@@ -80,7 +80,7 @@ export function Home() {
 
   const listFiles = async () => {
     let files = await jensen.listFiles();
-    console.log(files);
+    setFiles(files);
   }
 
   const getBluetoothStatus = async () => {
@@ -88,6 +88,20 @@ export function Home() {
     alert(JSON.stringify(info));
   }
 
+  const transferFile = async () => {
+    if (files.length == 0) return alert('No files found');
+    let idx = prompt('请输入文件序号（从0开始）：', '0');
+    if (idx === undefined) return;
+    if (idx === null) return;
+    let num = parseInt(idx);
+    if (isNaN(num)) return;
+    if (num < 0 || num >= files.length) return alert('无效序号');
+    let file = files[num];
+    jensen.getFile(file.name, file.length, (segment) => {
+      // ...
+    });
+  }
+
   return (
     <>
     <div style={{ display: 'flex', flexDirection: 'row', gap: '16px', padding: '16px', alignItems: 'center' }}>
@@ -101,6 +115,7 @@ export function Home() {
         Get Time
       </button>
       <button style={{ width: '200px', height: '50px' }} onClick={listFiles}>List Files</button>
+      <button style={{ width: '200px', height: '50px' }} onClick={transferFile}>Transfer</button>
       <button style={{ width: '200px', height: '50px' }} onClick={getBluetoothStatus}>Bluetooth Status</button>
       <button style={{ width : '200px', height : '50px' }} onClick={bluetoothScan}>Bluetooth Scan</button>
       <button style={{ width : '200px', height : '50px' }} onClick={disconnectBTDevice}>Bluetooth Disconnect</button>

src/utils/jensen.js

@@ -889,7 +889,7 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
   // visibilitychange();
 
   // document.addEventListener('visibilitychange', visibilitychange);
-
+  let stime = new Date();
   let flen = 0;
   let handler = (msg) => {
     if (msg != null) {
@@ -901,6 +901,9 @@ Jensen.prototype.getFile = async function (filename, length, ondata, onprogress)
         Logger.info('jensen', 'getFile', 'file transfer finish.');
         // clearEventAndTask();
         // return OK indicates all file blocks received
+        let etime = new Date();
+        let cost = etime.getTime() - stime.getTime();
+        Logger.info('jensen', 'getFile', 'cost ' + cost + ' ms');
         return 'OK';
       }
     } else {