You are viewing the version of this documentation from Perl 5.37.5. This is a development release of Perl.
${^RE_TRIE_MAXBUF}

Controls how certain regex optimisations are applied and how much memory they utilize. This value by default is 65536 which corresponds to a 512kB temporary cache. Set this to a higher value to trade memory for speed when matching large alternations. Set it to a lower value if you want the optimisations to be as conservative of memory as possible but still occur, and set it to a negative value to prevent the optimisation and conserve the most memory. Under normal situations this variable should be of no interest to you.

This variable was added in Perl v5.10.0.

init