hinoglu Reporter
	Description • 7 years ago

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0
Build ID: 20170103031119

Steps to reproduce:

Refreshing the page with developer console open results in high memory consumption over time. Attached are the memory reports before and after 20 consequtive reloads (ctrl+shift+r) of the same page with the developer console open.  


Actual results:

Running out of memory over time results in system becoming unresponsive under huge system load. 


Expected results:

Memory consumption should not increase that much on each reload.

	hinoglu Reporter
	Comment 1 • 7 years ago

Forgot to add that, closing the developer console and running "minimize memory usage" on about:memory page before the system gets unresponsive gets everything back to normal.

	hinoglu Reporter
	Comment 2 • 7 years ago

Apparently the huge system load was caused by kswapd. Even though the same working routine continues and nothing changed other than updating to 52.0b5, i don't see kswapd taking over the system anymore. It was happening in the previous versions up until 52.0b5. But developer console still eats up lots of memory. 

I am running on zram with with vm.swappiness = 10. I've been seeing these topics on forums about kswapd going crazy on such systems and it being a nasty bug with no solution yet. But apparently 52.0b5 made it occur less then before, if not prevented/stopped causing it totally.

	bart-jan
	Comment 3 • 7 years ago

Same issue here, just testing websites html/css/javascript after a couple of hours the system gets unresponsive. Using version 53.0a2 (2017-02-21) (32-bits)

	David Merrill
	Comment 4 • 7 years ago

Using Firefox 54.0.1 (32-bit), I'm having the same issue. With developer tools on, if I do a lot of browsing or if the site I'm on refreshes periodically, browsing gradually slows down. If I leave developer tools active overnight on a periodically-refreshing site, browsing is v-e-r-y s-l-o-w when I come back to it in the morning. I need only close the developer tools, and browsing speed becomes normal almost immediately.

I will try to provide hard data soon. Thanks.

	Nicolas Chevobbe [:nchevobbe]
	Comment 5 • 6 years ago

Refreshing `data:text/html,<meta charset=utf8><script>console.log("hello", document)</script>` a lot seems to increase memory consumption.