That's because list assignment is not optimized.
  1. 4 long lists involved: @aa, @bb, 1 .. 2e7 twice, size 8e7;
  2. 3 lists involved, @aa, @bb, 1 .. 2e7, size 6e7;
  3. 2 lists involved, @cc, 1 .. 4e7, size 8e7;
  4. 1 list involved, size 4e7.
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: strange list operator by choroba
in thread [Resolved] strange list operator by xiaoyafeng

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