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Add an empty frozendict singleton #153060

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Add an empty frozendict singleton#153060
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interpreter-core(Objects, Python, Grammar, and Parser dirs)performancePerformance or resource usagetype-featureA feature request or enhancement

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vstinner
opened on Jul 5, 2026

I propose adding an empty frozendict singleton.

For example, it would be returned on the following operations:

  • frozendict()
  • frozendict({})
  • frozendict() | frozendict()
  • frozendict() | {}
  • frozendict.fromkeys([])

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    interpreter-core(Objects, Python, Grammar, and Parser dirs)performancePerformance or resource usagetype-featureA feature request or enhancement

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