Kristweb excessive memory usage

[Wendelstein7]

When having Kristweb opened for about 4 hours straight, I noticed my 12 GB ram machine was filling up slowly but surely. I opened up task manager and identified an (un)expected ram eater: Google Chrome. Continuing to the Chromium build in task manager, I noticed that my mirror of kristweb was using more than 1.6 GB of ram!

Screenshot of the chrome task manager:

Details as far as I currently know them:

• The krist browser tab has been open for at least 4 hours.
• In the beginning of those 4 hours I was browsing along my wallets, checking their balances.
• During those 4 hours, the /overview page (showing one of my wallets) was open.
• Memory usage got as far as 1.6 GB for the kristweb browser tab.
• The memory usage was steadily increasing by about 100 KB per second.
• I was using my own mirror of kristweb, version b1.0.14.

(my mirror: https://kristweb.energetic.pw/)

I've not been able to collect more information about this issue so far, but will try to take a heap snapshot next time I find kristweb eating my resources.

In the meantime: https://downloadmoreram.com/ ;)

[Lemmmy]

Heap snapshots for this are appreciated. Additionally, after taking a heap snapshot, it would also be helpful if you could record an allocation timeline for about 5 minutes, and send me that too.

A memory leak of this behaviour is most likely caused by live updates, which would pretty much boil down to transactions or work. A few things I noticed:

• ~1 MB is allocated every time a transaction to/from the current wallet is made
• ~5-10 MB is allocated every time the work changes

The transaction allocations could likely be:

• The requests to re-check the wallet's balance and update it in the wallet chooser
• Rendering the new transaction view
• Re-rendering the Recent Transactions panel

The work allocations are most likely the graph not being cleaned up properly (and I suspect this is the biggest cause here).

Additionally, I noticed zxcvbn is using quite a lot of memory, and its also a significant portion of the bundle size. It may be worth looking into an alternative.

[Lemmmy]

I've made the first steps to improving this in 89425fb. While it's not a solution, it's a start. For now, I would advise against running KristWeb for excessively long periods.