Performance RAM, HLOD


has anyone experience with performance, especially RAM usage in chrome.

For example I have the data:

terrain: 3dtiles, 30m accurancy of a region 300x500 km
imagelayer: 4 orthoimages with pyramids, tiles generated with gdal2tiles
imagelayer: osm level 1-5 as background worldwide also generated with gdal2tiles

chrome needs approx 1GB RAM, 80%GPU and 20% CPU on a high-level notebook

Is this normal ?
I think according to level of details the initial RAM (not zooming in details) should be lower ?