Salvaging takes about 1-2 seconds longer now compared to 1.0.4. So instead of simplifying salvaging by allowing salvaging multiple items they made it worse.
Oh no not 1-2 second what will we do now?
Are you going to say the same after having salvaged 50 items again and again?
It's obviously a bug, they made it snappier in the last patch and wrecked it with this patch. 2 seconds means 100 seconds to salvage 50 items. Multiply that with the runs per day and you'll see how it adds up significantly.
At a guess, might have something to do with doing it properly rather than doing it quickly but then having server-side memory leaks and stuff like Pilot Data Error.
Two seconds per item sounds like a lot though. Does it still take that long when you mass-salvage junk from the Vault?