##! Please refer to the documentation at
##! https://coreruleset.org/docs/development/regex_assembly/.

##! The text describes a performance issue with a simple regular expression "@{.*}" used for searching. The problem arises because the ".*" part matches any character zero or more times, which can lead to inefficient searching in some engines.

##! We want to reduce the possibility of impacting performance by removing the strings we can match before the one we are looking, "@{"
##! This regex avoids the double backtracking problem and ensures it finds the first "@{" efficiently.

##! The prefix here to prevent backtracking is:
##! - something that is not an '@'
##! - or something that is an '@', but is not followed by '{'

##!^ ^(?:[^@]|@[^{])*

@+{[^}]*}