Specter v2.0.1 is now so slow that I get an error when trying to look at the settings for the wallet.

[freddiemacd]

Describe the bug
I have a long-term wallet with over 1000 change addresses. I updated from v1.13 to v2.0.1. It takes many minutes to first load the wallets when opening Specter Desktop. Much much longer than with v1.13. If I select settings after about 1 minute I get a server error that lists the exception as 'dictionary changed size during iteration'. I have had to revert to the 1.13 app image to use Specter Desktop

To Reproduce
Happens every time I try to look at settings of this heavily used wallet.

Expected behavior
It should list the settings.

Screenshots
none

Desktop (please complete the following information):

• intel NUC
• Where is your specter running: binary
• If you're running a binary, which OS: Ubuntu
• Browser n/a
• Specter Version 2.0.1

[BTCBellyButton]

Same here! #2316
Unusable.

[bitcoinheiro]

Same here, I was unable to do the most basic stuff with it. Unusable.

[spyhuntergenral]

Can confirm this issue, with a fresh build from source,
default configs, no wallets.
on Firefox, chrome and edge. it takes around 25 seconds to load any page.
Nothing of interest in logs.

only thing of interest is this error from the browser debug:
GET | http://INTERNAL_HOSTS_IP:35729/livereload.js?snipver=1 Returns 'NS_ERROR_NET_TIMEOUT'

the v1.x train worked perfectly so rolling back :(

[xavierfiechter]

#2460