[New-bugs-announce] [issue46532] Improve effeciency of PRECALL/CALL instructions

[Mark Shannon]

New submission from Mark Shannon <mark at hotpy.org>:

The PRECALL/CALL bytecode pair for calls is new (still in review at time of writing) and is not as efficient as it could be.

Some possible improvements are:

Transfer refcount of func when making a frame.

NULL call_shape.kwnames after use instead of in PRECALL, as many specialized instructions already assert that it is NULL.

Specialize the PRECALL instructions. Either for simple cases like `type(arg)` so we can skip the CALL, or for complex cases like `PythonClass(args)` where PRECALL can create object, and set up the frame so that `CALL` calls the __init__ function.

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assignee: Mark.Shannon
messages: 411721
nosy: Mark.Shannon
priority: normal
severity: normal
status: open
title: Improve effeciency of PRECALL/CALL instructions

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46532>
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