How to send a large amount of data faster ?

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Polypod

Thanks @ClearMemory041063 for giving attention to my problem, and for the codes to try. You are not testing them on an esp8266, are you ? The last code makes 11,5kb minified, it does not fit, it interrupt the transfer from the IDE. So I had to remove the connecting code and reduce the data to send to 3kb. I cannot send more at once without getting memory errors.

Unfortunately, at the end, the result with ws is as slow as with http: 2.5sec for 3kb (see the code below). Maybe because ws server is built on top of an http server.

var n = 5, chk=3*1024;
var tdata=new Uint8Array(chk);
var i;
for(i=0;i<1024;i++){
  tdata[i]=0x30;
  tdata[i+1024]=0x31;
//  tdata[i+1024*2]=0x32;
//  tdata[i+1024*3]=0x33;
//  tdata[i+1024*4]=0x34;
}//next i
 
var page = '<html><body><script>var ws;setTimeout(function(){';
page += 'ws = new WebSocket("ws://" + location.host + "/my_websocket", "protocolOne");';
page += 'var t=(new Date()).getTime();ws.onmessage = function (event) { console.log("t:",(new Date()).getTime()-t,"MSG:",event.data); };';
page += 'setTimeout(function() { ws.send("Hello to Espruino!"); }, 1000);';
page += '},1000);</script></body></html>';

function onPageRequest(req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end(page);
}

var server = require('ws').createServer(onPageRequest);
server.listen(80);
server.on("websocket", function(ws) {
    ws.on('message',function(msg) { print("[WS] "+JSON.stringify(msg)); });
  var t=getTime();
  ws.send(E.toString(tdata));
  print("n=",n,"t:",(getTime()-t).toFixed(3),"sec");
  var inter=setInterval(function(){
    var l=ws.socket.dSnd.length;
    print("t",getTime()-t,"l",l);  
    if(l===0) clearInterval(inter);
  },100);
 //   ws.send("Hello from Espruino!");
});

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|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
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Flash map 4MB:512/512, manuf 0xef chip 0x4016
>
=undefined
n= 5 t: 0.018 sec
t 0.12109500000 l 2984
t 0.22103200000 l 2984
t 0.32097500000 l 2716
t 0.420522 l 2716
t 0.52113300000 l 2448
t 0.62102500000 l 2448
t 0.72063500000 l 2180
t 0.82108700000 l 2180
t 0.921061 l 1912
[WS] "Hello to Espruino!"
t 1.020693 l 1644
t 1.12096200000 l 1644
t 1.22103700000 l 1376
t 1.32081700000 l 1376
t 1.42095800000 l 1108
t 1.52093400000 l 1108
t 1.62055600000 l 840
t 1.72074900000 l 840
t 1.82093100000 l 840
t 1.92100099999 l 572
t 2.020918 l 572
t 2.12098700000 l 304
t 2.220733 l 304
t 2.320561 l 36
t 2.42057400000 l 36
t 2.52083200000 l 0

How to send a large amount of data faster ?

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