Erlang (HLDS -> ELDS) optimization options - The Mercury User's Guide

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9.10.4 Erlang (HLDS -> ELDS) optimization options

--erlang-switch-on-strings-as-atoms: Enable a workaround for slow HiPE compilation of large string switches by converting the string to an atom at runtime and switching on atoms. Do not enable if the string switched on could be longer than 255 characters at runtime.