Is it really the fastest way? I imagine that without extra data it may be, but what I was proposing in a cousin comment would involve profiling and early fast r

Is it really the fastest way? I imagine that without extra data it may be, but what I was proposing in a cousin comment would involve profiling and early fast rejection by means of efficient multiple string matching. The browser should be able to collect a significant amount of historical matching data to optimize these lookups.