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Showing content from https://mail.python.org/pipermail/python-dev/2017-May/147999.html below:

[Python-Dev] Micro-optimizations by adding special-case bytecodes?

[Python-Dev] Micro-optimizations by adding special-case bytecodes? [Python-Dev] Micro-optimizations by adding special-case bytecodes?Xavier Morel python-dev at masklinn.net
Wed May 24 14:26:24 EDT 2017
> On 2017-05-24, at 20:07 , Ben Hoyt <benhoyt at gmail.com> wrote:
> 
> Hi folks,
> 
> I was looking at some `dis` output today, and I was wondering if anyone has investigated optimizing Python (slightly) by adding special-case bytecodes for common expressions or statements involving constants?

Python 3.6 added an opcode specifically for dicts with constant keys:
https://bugs.python.org/issue27140. Though I guess that's a slightly
different case as it's not a peephole-fused opcode.
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