Possible memory leak causing massive RAM usage on Mac Safari

Memrise Bug Control Web Bugs
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Please use the following template to provide all the requested details and help us investigate faster.

  • Description of the issue: There appears to be some kind of memory leak when using Memrise on Safari. If I have Memrise open for a couple hours of studying, it starts to take up 2+ gigs of ram. The only way to fix it is to dump the cache using the developer tools menu and restart Safari.

  • Your device and browser details MacBook Pro 2017 13in 16gb RAM

  • Description of steps to reproduce the issue Study for an hour or so in Memrise and/or leave Memrise open as a tab for a few hours after studying doing a couple 100 word speed reviews.

  • Do you have any screenshots of the problem? Please upload them here. I just dumped the cache but I will follow up with screenshots. This popup comes up https://appletoolbox.com/webpage-using-significant-energy-in-safari-heres-what-you-should-know/ and when I go to activity monitor it shows Memrise using multiple gigs of RAM until I empty the cache and restart the browser, where it then hovers around 170-250mb until the process repeats.

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Upon further examination it seems you need to leave the tab open on the page that appears right after you finish a learning session and won’t happen if you have it back on the course homepage or the statistics page which I left open all last night as an experiment.

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@Mark_Boyd, I am attaching @MemriseSupport, otherwise they may not see this proplem.

3 Likes
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Thanks, I just upgraded to Big Sur and it doesn’t seem to be happening now, I will keep a look out and see if it happens again!

2 Likes
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Thanks for the report - I’ve raised this to the relevant team, who will have a look asap. If it keeps happening, please do let us know.

Best,
A.

6 Likes
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Thanks for spotting this, Mark!

We also have a new version of Speed Review available if you turn Memrise Labs on in https://app.memrise.com/settings/learning/. Let us know if that is any better.

If the new version is causing you issues, we’ll definitely get this fixed for you.

James on the Web Team

9 Likes
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Thanks! I’ll empty my cache and try it out now, it just started happening again

Screen Shot 2020-11-16 at 16.42.322
Screen Shot 2020-11-16 at 16.42.3221484×247 34.1 KB

Also just as an aside, how insane is it that the touchbar takes up nearly 1/16th of my ram jesus what a terrible design idea.

1 Like
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Just used the new speed review and same problem still there, sorry!

Screen Shot 2020-11-16 at 20.21.41
Screen Shot 2020-11-16 at 20.21.412016×90 14.3 KB

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Ive seen this happen with other websites since posting this - not sure its purely a Memrise problem or something with how Safari works or what, but Ill mark this as solved as it doesnt seem specifically to only happen with Memrise.

1 Like