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Issue 612930 link

Starred by 1 user
Status: WontFix
Owner: ----
Closed: May 2016
Components:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 3
Type: Bug



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W/art: Attempt to remove non-JNI local reference, dumping thread

Reported by g...@kochaniak.com, May 18 2016 
WebView in Android N emulator is again very slow, and there are thousands of these error messages in logcat: " W/art: Attempt to remove non-JNI local reference, dumping thread".

Device name: Android Emulator N Rev. 3
Android version: N
WebView version (from system settings -> Apps -> Android System WebView):51.0.2693.3
Application: @Voice Aloud Reader
Application version: 8.6.8

URLs (if applicable): https://play.google.com/store/apps/details?id=com.hyperionics.avar



Steps to reproduce:
(1)
(2)
(3)

Expected result:


Actual result:

Comment 1 by g...@kochaniak.com, May 18 2016 

Forgot to enter steps to reproduce, but just open any app using a WebView, load some content (may be only text), try to scroll, observe how slow it is and look at logcat output.
Same issue when using the WebView Browser Tester 51.0.2693.3, an app that comes built-in with the Google emulator.

Comment 2 by boliu@chromium.org, May 18 2016

Status: WontFix (was: Unconfirmed)
The log is checkjni errors, and you can get rid of the error by disabling checkjni. Tracking bug for fixing those errors is crbug.com/506850; it's low priority because the errors are harmless in practice.

Webview being slow in the emulator is a separate issue. Emulator still does not support all the GPU features required to run webview in hardware mode, so we intentionally run webview in software only mode in emulators, which is slooooowwwww.

My recommendation right now for webview development is still use real devices.
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