mirror of
https://github.com/novnc/noVNC.git
synced 2026-05-26 07:08:06 +00:00
67b4e9879a
Generally, most servers send hextile updates as single updates containing many rects. Some servers send hextile updates as many small framebuffer updates with a few rects each (such as QEMU). This latter cases revealed that shifting off the beginning of the receive queue (which happens after each hextile FBU) performs poorly. This change switches to using an indexed receive queue (instead of actually shifting off the array). When the receive queue has grown to a certain size, then it is compacted all at once. The code is not as clean, but this change results in more than 2X speedup under Chrome for the pessimal case and 10-20% in firefox.
169 lines
5.1 KiB
HTML
169 lines
5.1 KiB
HTML
<html>
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<head>
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<title>VNC Playback</title>
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<link rel="stylesheet" href="include/plain.css">
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</head>
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<body>
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Iterations: <input id='iterations' style='width:50' value="3">
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<input id='startButton' type='button' value='Start' style='width:100px'
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onclick="start();" disabled>
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<br><br>
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<div id="VNC_screen">
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<div id="VNC_status_bar" class="VNC_status_bar" style="margin-top: 0px;">
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<table border=0 width=100%><tr>
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<td><div id="VNC_status">Loading</div></td>
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</tr></table>
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</div>
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<canvas id="VNC_canvas" width="640px" height="20px">
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Canvas not supported.
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</canvas>
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</div>
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<br>
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Results:<br>
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<textarea id="messages" style="font-size: 9;" cols=80 rows=25></textarea>
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</body>
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<!--
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<script type='text/javascript'
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src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
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-->
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<script src="include/vnc.js"></script>
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<script>
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var rfb, fname, test_state, frame_idx, frame_length, iteration,
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iterations, start_time, packetID, waitTimer;
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function message(str) {
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console.log(str);
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cell = $('messages');
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cell.innerHTML += str + "\n";
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cell.scrollTop = cell.scrollHeight;
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}
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fname = (document.location.href.match(
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/data=([A-Za-z0-9\._\-]*)/) ||
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['', ''])[1];
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if (fname) {
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message("Loading " + fname);
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document.write('<script src="' + fname + '"><\/script>');
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} else {
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message("Must specify data=FOO in query string.");
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}
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// Override send_array
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send_array = function (arr) {
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// Stub out send_array
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}
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updateState = function (rfb, state, oldstate, msg) {
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switch (state) {
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case 'failed':
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case 'fatal':
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message("noVNC sent '" + state + "' state during iteration " + iteration);
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test_state = 'failed';
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break;
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case 'loaded':
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$('startButton').disabled = false;
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break;
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}
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if (typeof msg !== 'undefined') {
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$('VNC_status').innerHTML = msg;
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}
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}
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function start () {
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$('startButton').value = "Running";
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$('startButton').disabled = true;
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test_state = 'running';
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iterations = $('iterations').value;
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iteration = 0;
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frame_length = VNC_frame_data.length;
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total_time = 0;
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start_time = (new Date()).getTime();
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setTimeout(next_iteration, 1);
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}
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function next_iteration () {
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var time, iter_time, end_time;
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if (test_state !== 'running') { return; }
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if (iteration !== 0) {
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rfb.disconnect();
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}
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iteration++;
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if (iteration > iterations) {
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// Finished with all iterations
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var end_time = (new Date()).getTime();
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total_time = end_time - start_time;
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iter_time = parseInt(total_time / iterations, 10);
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message(iterations + " iterations took " + total_time + "ms, " +
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iter_time + "ms per iteration");
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rfb.get_canvas().stop(); // Shut-off event interception
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$('startButton').disabled = false;
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$('startButton').value = "Start";
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return;
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}
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frame_idx = 0;
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rfb.connect('test', 0, "bogus");
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setTimeout(do_packet, 1);
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}
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function do_packet () {
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var frame;
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if (test_state !== 'running') { return; }
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frame = VNC_frame_data[frame_idx];
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while (frame.charAt(0) === "}") {
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//message("Send frame " + frame_idx);
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frame_idx ++;
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frame = VNC_frame_data[frame_idx];
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if (frame_idx >= frame_length) {
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break;
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}
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}
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//message("Processing frame: " + frame_idx);
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if (frame) {
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if (frame === 'EOF') {
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//message("Found EOF");
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} else {
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rfb.recv_message({'data' : frame.slice(frame.indexOf('{', 1)+1)});
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}
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frame_idx++;
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}
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if (frame_idx >= frame_length) {
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next_iteration();
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} else {
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setTimeout(do_packet, 1);
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}
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}
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window.onload = function() {
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if (fname) {
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message("VNC_frame_data.length: " + VNC_frame_data.length);
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rfb = RFB({'target': 'VNC_canvas',
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'updateState': updateState});
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rfb.testMode(send_array);
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rfb.init();
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}
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}
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</script>
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</html>
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