[New-bugs-announce] [issue26200] SETREF adds unnecessary work in some cases

[Raymond Hettinger]

New submission from Raymond Hettinger:

Application of the SETREF macro was not code neutral in a number of cases.  The SETREF macro always uses Py_XDECREF where the original code correctly used a faster and lighter Py_DECREF.

There should be an XSETREF variant and more care should be taken when applying these macros wholesale to the entire code base.

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assignee: serhiy.storchaka
components: Interpreter Core
messages: 258913
nosy: rhettinger, serhiy.storchaka
priority: normal
severity: normal
status: open
title: SETREF adds unnecessary work in some cases
type: performance
versions: Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26200>
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