for example, the regex [a-zA-Z] only cares about two kinds of characters: letters and everything else. so instead of individually taking derivatives for 52 alphabet characters a..z, A..Z, we can conclude from the start that there are only two kinds of characters we care about: letters ([a-zA-Z]) and non-letters ([^a-zA-Z]).
Apart from colors, and background-colors, Ansi escape codes also allow decorations on the text:
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Surprisingly, an apparent win for Mongo, but let's give a second chance to both. Running the case again with 24 000 QPS for the Documenter and 6000 QPS for the Elephant:
Стало известно об изменении военной обстановки в российском приграничье08:48