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As default there are NO limits to the number of elements that can be saved on the backtrack stack. Also there are NO limits on the number of backtracks that are allowed to perform a regex match. However, if the caller wishes to define limits on the regex evaluation, then limits can be set with this call. Note, that the limits are not statically defined in the compile() call, and so can be changed during execution by repeatily calling this function at any time. Note, that these parameters only work on the backtrack evaluation algorthm. If the 'MODIFIER_FASTGREEDY' modifier is used in a call to search, match, or replace, then these limits will not apply, because that DFA-like algorthm does not use backtracks.
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