<p>How can we reserve memory (or allocate memory without initialization) in Julia? In C++, a common pattern is to call <code>reserve</code> before calling <code>push_back</code> several times to avoid having to call on <code>malloc</code> more than once. Is there an equivalent in Julia?</p>

reserve array memory in advance in Julia

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julia

How can we reserve memory (or allocate memory without initialization) in Julia? In C++, a common pattern is to call reserve before calling push_back several times to avoid having to call on malloc more than once. Is there an equivalent in Julia?

581

asked Dec 18 '22 06:12

Matt

1 Answers

I think you are looking for sizehint!

help?> sizehint!
search: sizehint!

  sizehint!(s, n)

  Suggest that collection s reserve capacity for at least n elements. This can
  improve performance.

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