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For example `foo.*|bar.*|baz.*`. Instead of checking each one in turn, we build a map of prefixes, then check the smaller set that could match the string supplied. Signed-off-by: Bryan Boreham <bjboreham@gmail.com> * Improve testing and readability Address review comments on #13843 Signed-off-by: Marco Pracucci <marco@pracucci.com>