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A comment on Legitimate Use of Variable Length Arrays. Parent comment

Re:Legitimate Use of Variable Length Arrays by bdisnainc on Monday October 28, 2019 @12:19PM (#21378305)
Very good GCs can be faster compared to common system allocators while minimizing the STW moment, but you cannot beat using a proper allocator for your needs.
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Re:Legitimate Use of Variable Length Arrays by chrisseaton on Monday October 28, 2019 @10:31PM (#21383812)
> but you cannot beat using a proper allocator for your needs

How do you know this to be true?

And why isn't a GC a 'proper' allocator?

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