Data size usually is the constraining factor in performance. Loading memory from your SSD, loading it through the internet. Processing it: the smaller the data the lower in the cache hierarchy it will sit, copying data is expensive, less data means less register pressure.

And performance still sucks for many things. They should be instantaneous (in under one frame, which is ~1.6ms). Loading and parsing SVG files from the internet is one such thing that takes way too long.