Server thread hitch wanring when coming through scanner

[nzkfc]

When player 1 comes through scanner, server console has server thread hitch warning that seems to jump around. Not sure if this is an optimization thing as it runs through checking the items, or something else?

https://i.imgur.com/3fPxa9I.png

Each pass of the scanner will cause the above image block of hitches.

Seems if I change Config.MetalItems to 1 item, the hitch is once with about 200ms, full list of items does the block.