I'm trying to build a mobile application using Google Maps Javascript API v3. Functionally, it's doing fine, but the performance is really sluggish on middleware Android devices (used Samsung Galaxy 3 for testing). I also checked the performance on the official , had the same result, and using the first example code as well. Is there any mobile specific step, I might have missed (see the example code), or the Javascript API performance is limited to this level, and building a native application cannot be avoided in this case?
Thank you very much for the answers!
Here is the code of the linked page:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src=";sensor=SET_TO_TRUE_OR_FALSE">
</script>
<script type="text/javascript">
function initialize() {
var myOptions = {
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
I'm trying to build a mobile application using Google Maps Javascript API v3. Functionally, it's doing fine, but the performance is really sluggish on middleware Android devices (used Samsung Galaxy 3 for testing). I also checked the performance on the official http://maps.google., had the same result, and using the first example code as well. Is there any mobile specific step, I might have missed (see the example code), or the Javascript API performance is limited to this level, and building a native application cannot be avoided in this case?
Thank you very much for the answers!
Here is the code of the linked page:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.googleapis./maps/api/js?key=YOUR_API_KEY&sensor=SET_TO_TRUE_OR_FALSE">
</script>
<script type="text/javascript">
function initialize() {
var myOptions = {
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
- would love to see some sort of answer on this one! – Randy L Commented Jun 23, 2012 at 9:09
- Did you try putting your script and the bottom? – Ashwin Singh Commented Jun 25, 2012 at 13:53
- I don't think it's possible to have a performance as good as a native app using it, but I can't prove that to you. It's more like an opinion than an answer. Good luck with that! :) – Leaudro Commented Jun 26, 2012 at 14:12
- 2 Perhaps this can be of help: stackoverflow./questions/875678/… – Gunnar Karlsson Commented Jun 27, 2012 at 17:37
- 1 When you say performance is bad, is it that it takes too much time to load or once loaded, the interactions are sluggish? – iwiznia Commented Jun 28, 2012 at 18:02
2 Answers
Reset to default 9 +75As per official documentation, your code is right. And maps is optimized.
I suggest:
- Try to change the script URL to
http://maps.googleapis./maps/api/js?sensor=false - Load scripts at end of page.
Example:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100%; width: 100%; }
</style>
</head>
<body>
<div id="map_canvas"></div>
<script src="http://maps.googleapis./maps/api/js?sensor=false"></script>
<script>
function initialize() {
var myOptions = {
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</body>
</html>
Try the demo out at http://fiddle.jshell/tomasdev/8FhYz/show/light/ — I'm in doubt regarding your device. If official demos work slow, I don't think there is a quite good solution.
Google maps performance is VERY MUCH dependant on how well structured the whole page is.
The biggest performance hit usually es from repaint/render cycles of the page - caused by the tiles loading / unloading.
Dependant on how the map is placed and how you use it, it's a benefit to position the map element using position:fixed, taking it out of the document flow. Position:absolute can also help, but not as much as 'fixed'.