@code{re_compile_pattern}, you can reuse a buffer data structure across
multiple searches with different patterns, and allocate the fastmap only
once. Nonetheless, the fastmap must be recompiled each time the buffer
@code{re_compile_pattern}, you can reuse a buffer data structure across
multiple searches with different patterns, and allocate the fastmap only
once. Nonetheless, the fastmap must be recompiled each time the buffer