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Redundant copy cleanup (NFC) #4587

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Redundant copy cleanup (NFC) #4587

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@sfu2 sfu2 commented Jan 23, 2026

This PR fixes a few unnecessary copies related to containers.

  1. replace push_back with emplace_back to avoid a temporary copy of Datafile
  2. iterate unordered map with reference to avoid implicit container copy
  3. rewrite tpool::circular_queue::resize to resize the vector in place
    If m_head > m_tail, resize and update m_capacity. Else, shift elements after m_tail to the end of the vector.

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CLAassistant commented Jan 23, 2026 •
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@gkodinov gkodinov added the External Contribution All PRs from entities outside of MariaDB Foundation, Corporation, Codership agreements. label Jan 24, 2026
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