If certain things are expected to match more than 32766 times, you need to break it down.

So if the following exceeds the limit, 

a+

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you have to use 
(?:a{1,32766})+

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So, 
/\G (?: \s++ | \# .*+ )++ /xgc

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becomes 
/\G (?: (?: \s++ | \# .*+ ){1,32766}+ )+ /xgc

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Or maybe even 
/\G
   (?: (?:
        (?: \s{1,32766}+ )++
      | \# (?: .{1,32766}+ )*+

   ){1,32766}+ )+
/xgc

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In reply to Re^3: Simple way to skip spaces and # comments by ikegami
in thread Simple way to skip spaces and # comments by leszekdubiel

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