Comment by krackers

https://news.ycombinator.com/item?id=23514072 and https://news.ycombinator.com/item?id=12354494 seem to contradict this and claim that modern intel processors don't use separate AGU for LEA...

Not too versed here, but given that ADD seems to have more execution ports to pick from (e.g. on Skylake), I'm not sure that's an argument in favor of lea. I'd guess that LEA not touching flags and consuming fewer uops (comparing a single simple LEA to 2 ADDs) might be better for out of order execution though (no dependencies, friendlier to reorder buffer)