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https://issues.apache.org/jira/browse/CB-10276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15073874#comment-15073874
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Kirill Anoshin commented on CB-10276:
-------------------------------------
Another 3rd party plugin that now causes 100% cpu is
https://github.com/katzer/cordova-plugin-printer. This plugin must run in the
main thread because calling UIKit from secondary thread causes errors and will
be deprecated in future iOS releases.
> cordova-ios@4 is unstable
> -------------------------
>
> Key: CB-10276
> URL: https://issues.apache.org/jira/browse/CB-10276
> Project: Apache Cordova
> Issue Type: Bug
> Components: iOS
> Environment: [email protected] [email protected]
> Reporter: Kirill Anoshin
> Priority: Blocker
> Labels: cordova-ios-4.1.0
>
> Here is a demo project to reproduce unstable behavior -
> https://github.com/kanoshin/cordova-bug-reproduction. You can try to run this
> app ~20 times and I'm sure that you will be able to reproduce huge memory
> leak and 100% cpu usage (both on real device and emulator). This app shows
> current state on the screen - "Done!" means that everything is fine, any
> other state is most likely a marker of 100% cpu usage.
> This app is using 3rd party plugin that works stable on previous versions of
> cordova-ios. After some research I noticed that unstable behavior disappears
> if I wrap all plugin calls in:
> {code}
> [self.commandDelegate runInBackground:^{
> ...
> }];
> {code}
> block. Otherwise WebThread sometimes goes crazy and device becomes
> unresponsive. I believe that this is a bug because previously it was ok to
> run plugin calls that takes small amount of time in the main thread. Also it
> seems that a lot of existing plugins don't care about running in background
> thread and it makes update to cordova-ios@4 impossible.
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