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From "Sergey Grebnov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CB-8916) Huge memory consumption in iOS 8 with compass plugin when filter parameter is not specified
Date Thu, 21 Jan 2016 08:45:39 GMT

     [ https://issues.apache.org/jira/browse/CB-8916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Grebnov updated CB-8916:
-------------------------------
    Component/s:     (was: Plugin Device Motion)
                 Plugin Device Orientation

> Huge memory consumption in iOS 8 with compass plugin when filter parameter is not specified
> -------------------------------------------------------------------------------------------
>
>                 Key: CB-8916
>                 URL: https://issues.apache.org/jira/browse/CB-8916
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: Plugin Device Orientation
>    Affects Versions: 3.7.0
>         Environment: Cordova iOS 3.7.0
> JQuery Mobile 1.3.2
> iOS 8
>            Reporter: wei zhang
>
> Hi, I found a bug that occurs if the filter parameter is not specified. It triggers a
large memory consumption in the app and ultimately the app will not respond to user input.

> My function tracks the direction for a list of places, and updates the heading in real
time (one for each place). The code below is my function. When I tested my app(built against
iOS 8 SDK) on both iOS(iPhone5 iOS8) emulator and iPhone 6(iOS 8.0.2), the memory consumption
increased significantly when the function was called. The app failed to respond after about
1 minute 40 seconds, and the memory usage was around 270 mb(I was monitoring in XCode). The
console log Compass Count indicates that the app usually dies when count reaches around 960.

> The issue occurs when the app is built against iOS SDK 8.1. However the same code runs
fine in the app when it is built against iOS 7 SDK (there is no noticeable increase in memory
consumption). 
> Could you please look into this? Thanks
> function activateCompass(frequency, callback){
>                 var frequency = frequency || 100;
>                 console.log("frequency is " + frequency);
>                 var options = { frequency: frequency};
>                 compassHeading = navigator.compass.watchHeading(
>                                 function compassSuccess(heading) {
>                                                 console.log('Compass Count: ' + compassCounter++);
>                                                 callback(heading.magneticHeading);
>                                 },
>                                 function compassError(compassError){
>                                                 console.log('Compass error: ' + compassError.code
+ ' Counter is ' + compassCounter++);
>                                 },
>                                 options
>                 );



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