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What are you using?
I have Pirelli Cinturo 700x45 and they supposedly have a decent rolling speed but are outrageously heavy (over 600g) each. I know weight shouldn't matter so much, but I can really feel the difference compared to Gravelking SK 700x38, which were around 400g IIRC. I'm also taking the bike on planes a reasonable amount, and always right on the edge of weight limit, so even a few hundred grams reduction here and there helps.
I'm also realising more and more that I simply don't need such big tyres 90% of the time as usually on road or dry hardpack). Tempted to do a gravel tyre multi-criteria decision analysis thing.
keepit-
Try Conti Terra Speed. They are excellent. They come in a 45, but only 60g lighter than Cinturato and they don’t last as long.
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Get the Vittoria Terreno Zero, especially if you rarely use it off road, and big slick tyres work surprisingly well except for mud.
The Pirelli is much tougher and felt fast off road and roll well on the road; you can kinda feel the weight when accelerating but that’s about it.
Edit; TBF I ride with carbon wheels which massively offset the tyres weight so the difference is quite small.
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Rene Herse. Have a look.
I got the 650x 47 switchback hill for myself but personally find it too big for general use. It's really wonderful on gravel and rough surfaces, especially with loaded bags, which is what I got it for.
My wife's Babyshoe pass is a much better choice for general use and functions perfectly well in rough stuff also.
There are a few more asphalt oriented options and knobby options as well in both 700 and 650b.
snoops
edscoble
bright
My 650x47c are 401 grams, tubeless.
My wife has a 650x42c that is 373 grams, tubeless.
Nothing heavy about that, and they are full of squishy comfortable air.