Characters in these blocks weren't correctly identified as assigned characters, which caused the encoders to always encode them, even if the ranges were in the allow list.
Provides extra defense-in-depth in case an application is using this API to encode a relative URL, otherwise the part before the colon could inadvertently be treated as a scheme.
I also experimented with having a fixed uint[] field inside the struct, but this actually ended up having worse performance than a proper uint[] array reference since it defeated some of the JITter's optimizations.
Levi B
Chris Ross
Doug Bunting
Brennan
N. Taylor Mullen
Hao Kung