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OpenSteetMap is very difficult to compare to Google Maps as it uses pre-rendered raster map images at fixed resolutions, rather than a dynamic vector-based approach. For me at least, this makes it far slower to load in non-cached areas, and the lack of precise zooming is super annoying.
For me Google Maps is slower than OpenStreetMap anywhere in the world, cache or no cache. Might have something to do with not using Chrome, where Google makes their websites work the best of course. What do you mean by "the lack of precise zooming is super annoying"? In my experience, zooming in Bing Maps and OpenStreetMap are very fast, and only in Google Maps you're waiting ten seconds for the region to load and br…
To test out, try modifying the "10" in both of the links below: https://www.google.com/maps/@40.7058316,-74.2581905,10z
https://maps.here.com/?map=40.71455,-74.00714,10,normal&x=ep