this behaviour means that the untie happens almost immediately after the tie, i.e. the potential for possible ugly side effects is practically zero.
My benchmarks show attributes are much slower than a (&;@) sub, especially for short lists (many thousand times).
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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