Weld constraints and CFrame generating immense lag

I put a ship together with a whole bunch of weld constraints and move it with CFrame, however this seems to be generating immense lag. Anyone know how I can fix this?

Why are you using welds for this?

I tried just keeping them anchored but that doesn’t work cause then they don’t move. But if I don’t add welds it all just falls out of the sky

If this is lagging before testing it, try disabling this:
image
(this is found under the Model tab)

If it lags after testing, you may want to group parts together and connect them to eachother than welding all of them to one specific part.