add function to reduce the points, future versions need to calc min/max

of deleted points, but that involves date math I don't want to do yet.

root/js/solardash.file.jspp

@@ -24,6 +24,26 @@ Array.prototype.bisect = function (val, lo, hi) {
 	return lo;
 };
 
+// Reduce array ar down to cnt number of points if necesssary
+function reducepoints(ar, cnt) {
+	// If we're already less than cnt, don't do anything.
+	if (ar.length < cnt)
+		return ar;
+
+	// Just skip points for now
+	var ret = [];
+	var x = 0;
+	for (idx = 0; idx < cnt; idx++) {
+		ret[idx] = ar[Math.floor(x / cnt)];
+		x += ar.length;
+	}
+
+	// always include the last point
+	ret[idx] = ar[ar.length - 1];
+
+	return ret;
+}
+
 WebSocketTest.prototype.send = function (s) {
 	console.log("ws send: " + s);
 	var msg = s.split(" ");
@@ -39,6 +59,7 @@ WebSocketTest.prototype.send = function (s) {
 			loidx -= 1;
 		hiidx = fakedata.production.bisect([msg[2], 0]) + 1;
 		var subar = fakedata.production.slice(loidx, hiidx);
+		subar = reducepoints(subar, 800);
 		var data = {
 			"production": subar,
 			"consumption": subar,