[issue26219] implement per-opcode cache in ceval

[Inada Naoki]

Inada Naoki <songofacandy at gmail.com> added the comment:

I committed cache only for LOAD_GLOBAL, which is much simpler than
LOAD_ATTR or LOAD_METHOD.

Caches for other instructions will be implemented 3.9 or later.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue26219>
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