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Place dict (and values) pointers at a fixed (negative) offset from the base of the object. #90105

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@markshannon

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@markshannon
BPO 45947
Nosy @markshannon, @Fidget-Spinner
PRs
  • bpo-45947: Place dict and values pointer at fixed (negative) offset just before GC header. #29879
  • Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = 'https://github.com/markshannon'
    closed_at = <Date 2022-01-20.11:51:02.049>
    created_at = <Date 2021-12-01.13:30:48.955>
    labels = ['interpreter-core', '3.11', 'performance']
    title = 'Place dict (and values) pointers at a fixed (negative) offset from the base of the object.'
    updated_at = <Date 2022-01-20.11:51:02.049>
    user = 'https://github.com/markshannon'

    bugs.python.org fields:

    activity = <Date 2022-01-20.11:51:02.049>
    actor = 'Mark.Shannon'
    assignee = 'Mark.Shannon'
    closed = True
    closed_date = <Date 2022-01-20.11:51:02.049>
    closer = 'Mark.Shannon'
    components = ['Interpreter Core']
    creation = <Date 2021-12-01.13:30:48.955>
    creator = 'Mark.Shannon'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 45947
    keywords = ['patch']
    message_count = 2.0
    messages = ['407457', '407946']
    nosy_count = 2.0
    nosy_names = ['Mark.Shannon', 'kj']
    pr_nums = ['29879']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'performance'
    url = 'https://bugs.python.org/issue45947'
    versions = ['Python 3.11']

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    3.11only security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)performancePerformance or resource usage

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