Interpreting Statement About SVG Performance in the Doc

Hi,

I am reading this

And it says,

rendering graphics in SVG can be slow for large datasets (like those with more than 15k points)

I am trying to understand the statement. Does it mean that one SVG file containing more than 15k points makes browser render slowly? Or a page containing multiple SVG files with a total of 15+K data points makes browser render slowly?

Thanks in advance.