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  1. Swift
  2. SR-3728

Explore using spare bits in references for ARC optimizations

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    • Type: Task
    • Status: Resolved
    • Priority: Medium
    • Resolution: Won't Do
    • Component/s: None
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      Description

      Ahead of ABI Stability, explore using spare bits in references to store local reference counts in order to perform some ARC operations more efficiently . These would need to be flushed to the object whenever a reference may escape or the local reference count reaches zero. If these local reference counts can cross ABI boundaries, then such a change will have to be implemented in an ABI-additive way with deployment target checking.

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            • Assignee:
              Unassigned
              Reporter:
              ematejska Ewa Matejska
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