Steps to reproduce the problem:
1. Load a page with big (1MB+) WOFF2 embedded webfonts.
2. Reload page a bunch of times.

(Example page: https://spiqle.com/test/memoryleak/ )

We're using a webview in our app to show content to the user. The webview loads a new page often (every 20 or 30 seconds). When using pages that contain big webfonts, memory seems to be leaking at a high rate. The example page above leaks about 20MB each time it reloads.

Swapping out the used fonts with much smaller fonts (for example the Calibri font hosted by Google, which are only 33kb a piece) seems to completely solve the problem.

For some reason, the memory leak seems to be much, MUCH bigger when the page contains a big image with a non-zero opacity (as in the example page). It doesn't matter if the image is a bitmap (PNG) or an SVG. (I've commented out the PNG In the test page, you can easily add it back in and remove the SVG).

We're running on an Odroid XU4 (which is based on the 32-bit Exynos 5422). On both Android 5.1.1 and Android 7.1 with the latest Android System Webview (and in the case of Android 7.1: Google Chrome set as a WebView), this issue exists.

On Android 5.1.1 this causes an app crash within 10 to 15 minutes if the page has reloaded every 15 seconds. (You can see the amount of free memory dropping by running "free" on the adb shell)

On Android 7.1 this triggers multiple garbage collections by the ActivityManager every 20 minutes or so and crashes the app after about an hour with an OOM error.

On the Odroid C2 (which is based on the 64-bit Amlogic S905 and has the same amount of RAM (2GB)) running Android 5.1.1, this problem does not trigger a memory leak. We can run our app happily all day long with the same page without a single crash.

This issue was reported in bug:  693069 
But since the topic start was not accurate anymore (i've pinpointed it to a completely different cause), a new bug has been posted here.

I don't know if it helps, but i attached a 7-zipped performance profile i've taken via chrome://inspect on the attached PC via ADB. It doesn't show an increase in memory though. (I've connected over ADB shell and am running "while [ 1 ] ; do free ; sleep 1 ; done" to keep an eye on memory usage)

What is the expected behavior?
No memory leaks, no crashes

What went wrong?
The app crashed

Crashed report ID: No

How much crashed? Whole browser

Is it a problem with a plugin? No 

Did this work before? No 

Chrome version: 56.0.2924.87 WebView  Channel: stable
OS Version: 7.1
Flash Version: 

I'm able to quickly compile and test WebView builds locally and if required can give remote access to the Odroid XU4 and C2.

 

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