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gh-100146: Steal references from stack when building a list #100147

Merged
merged 1 commit into from
Jan 3, 2023
Merged

gh-100146: Steal references from stack when building a list #100147

merged 1 commit into from
Jan 3, 2023

Commits on Dec 9, 2022

  1. pythongh-100146: Steal references from stack when building a list 

    When executing the BUILD_LIST opcode, steal the references from the stack,
in a manner similar to the BUILD_TUPLE opcode.  Implement this by offloading
the logic to a new private API, _PyList_FromArraySteal(), that works similarly
to _PyTuple_FromArraySteal().

This way, instead of performing multiple stack pointer adjustments while the
list is being initialized, the stack is adjusted only once and a fast memory
copy operation is performed in one fell swoop.
    @lpereira
    lpereira committed Dec 9, 2022
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