Datasmith takes long time to build light for a simple room

i solved all the problems with lightning by getting a 2020 graphic card. the only thing i wonder is why does it take nearly two hours to build light for a simple room created in SketchUp and imported with datasmith. when i created same room with same size and the same amount of assets it took me around 1 minute to build light witch is perfect but when i build light with datamith imported assets it can take up to 30 minutes or even two hours. i then found out that datasmith exports all assets in a sketchup file as single witch means it imports every small object as single. is there a way to make the object as one so it can go faster with building light?? other wise I’m so satisfied wit every thing working