Like Facebook's Dragon, Brotli is an algorithm that is optimized for typical usage patterns. Similarly, an entire IOS device could be fabricated as a single AS

Like Facebook's Dragon, Brotli is an algorithm that is optimized for typical usage patterns. Similarly, an entire IOS device could be fabricated as a single ASIC, and (for example) uikit could be fabricated as part of that ASIC. There is always a tradeoff between generic optimization and usage-specific optimization which comes at the expense of flexibility. Google can do a statistical analysis of all the data it serves compressed with gzip, and determine exactly the characteristics of a compression algorithm that would save the most money. These are small, evolutionary optimizations that save tons of money by incrementally increasing efficiency in a large system.