[Ugh]: Mods with a lot of unarmoured headgear or glasses (eg. USP) have extremely slow startup

[jaj22]

We currently add all cosmetic headgear and glasses to initial rebel equipment. However, some mods have an extremely high quantity (~14000 for USP), and the process of adding them to the arsenal is slow, because the arsenal addItem operation is a slow O(N) dependent on the size of the current arsenal tab array. Users will also be tempted to alt-tab, which makes the process another 10x slower.

If you do actually wait until the end, the arsenal times out on first attempt to open it, and appears to be showing a fraction of the hats on subsequent uses.