Frontend & browser·The network from the browser
the bundle is 800 kilobytes on disk and 190 over the wire, which is the number that matters.
Response compression
Also calledgzip, brotli, content-encoding
Encoding text responses with gzip or brotli so the transferred size is a fraction of the raw size. Brotli typically beats gzip by a further fifteen to twenty percent on JavaScript and CSS. It is the reason raw bundle sizes are misleading in both directions: minification gains partly overlap with what compression would have done anyway, and an image or font gains nothing because it is already compressed.