Program too big?

First day with the Esrpuino Wifi. I'm not sure what to expect, and I realize that it's an embedded platform. I have a lot of experience with Arduinos, the Esquilo, etc.

The following code will load and run if I comment out either the "startServer" or the "startLogging" functions. But if I try to run the whole program it fails with the following:

>  1v95 Copyright 2017 G.Williams
> >
> =undefined Erasing Flash... Writing....................... Compressed 114368 bytes to 21007 Checking... Done! Running onInit()...
> >ERROR: Prompt not detected - upload failed. Trying to recover... ERROR: Error processing Serial data handler - removing it. Execution
> Interrupted during event processing. New interpreter error: CALLBACK
> New interpreter error: BUFFER_FULL
> >echo(1)
> =undefined

var WIFI_NAME = "oddballpeak";
var WIFI_OPTIONS = { password : "mule$bacon44" };

var wifi;
var now = null;
var sample_array = [];
var arr_ptr = 0;
var tempF = 32;
var sampleCnt = 0;
var date = new Date();
var maxSamples = 672;
var ow = new OneWire(B0);
var sampleSec = 900;
var http = require("http");

function onInit() {
  wifi = require("EspruinoWiFi");
  wifi.connect(WIFI_NAME, WIFI_OPTIONS, function(err) {
    if (err) {
      console.log("Connection error: "+err);
      return;
    }
    console.log("Connected!");
    initProcess();
  });
}

function initProcess() {
  http.get("http://www.pur3.co.uk/hello.tx­t", function(res) {
    now = res.headers.Date;
    epoch = Date.parse(now);
    setTime(epoch/1000);
    console.log("Now: ", date.toString());
    setTimeout(startLogging, 3000);
    setTimeout(startServer, 5000);
  });
}

function startServer() {
  http.createServer(function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    page = "<h3>Logging</h3><br>";
    for (var i in sample_array) {
        page += sample_array[i].ts;
        page += "\t";
        page += sample_array[i].degF;
    }
    res.write(page);
  }).listen(80);   
}

function startLogging() {
  var sensor = require("DS18B20").connect(ow);
  setInterval(function() {
    sensor.getTemp(function (temp) {
      now = Date.now() / 1000;
      floor = parseInt(now);
      mod = floor % sampleSec;
      if (!mod) {
        tempF = ((temp * 9) / 5) + 32;
        sample_array[sampleCnt] = { "ts" : floor, "degF" : tempF };
        if (++sampleCnt == maxSamples) {
          sampleCnt = 0;
        }
      }
    });
  }, 1000);    
}

save();