4 ms·I don't know how much my tabs use, but it isn't 400MB or I'd have ran out of RAM a hundred tabs ago...by eximius 9y agoI don't know how much my tabs use, but it isn't 400MB or I'd have ran out of RAM a hundred tabs ago...fhood 9y agoI just checked on my work computer and you are right, only a few hovering around 300 or so. They may have made improvements or it may be a macOS thingko27 9y agoI am averaging around 150 MB per tab here.