Sketchup web/free changed recently? sketchup is terribly slow now

I noticed today and the last time that sketchup web/free is really slow on my computer whilst it was very fast before. Is there a new version available that uses much more resources?

100% cpu and 88% memory for example. Even selecting an element and changing its material cannot be done now.

I have in sketchup 3 models available. nr 1 is 48mb, nr 2 is 27mb, nr 3 is 28mb. I only work in nr 3.

I have a 50/50 mbps internet connection and work on an acer E5-571 notebook with a samsung evo ssd, with 4 gb memory. Other applications work normally, it’s only the chrome sketchup addon causing problems.

sketchup resources