Speed up iteration of bytes and bytearray

[kumaraditya303]

BPO	47012
Nosy	@gvanrossum, @sweeneyde, @kumaraditya303, @thatbirdguythatuknownot
PRs	bpo-47012: speed up iteration of bytes and bytearray #31867

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2022-03-23.08:33:17.074>
created_at = <Date 2022-03-14.11:13:25.006>
labels = ['interpreter-core', '3.11', 'performance']
title = 'Speed up iteration of bytes and bytearray'
updated_at = <Date 2022-03-23.08:33:17.071>
user = 'https://github.com/kumaraditya303'

bugs.python.org fields:

activity = <Date 2022-03-23.08:33:17.071>
actor = 'kumaraditya'
assignee = 'none'
closed = True
closed_date = <Date 2022-03-23.08:33:17.074>
closer = 'kumaraditya'
components = ['Interpreter Core']
creation = <Date 2022-03-14.11:13:25.006>
creator = 'kumaraditya'
dependencies = []
files = []
hgrepos = []
issue_num = 47012
keywords = []
message_count = 2.0
messages = ['415129', '415858']
nosy_count = 4.0
nosy_names = ['gvanrossum', 'Dennis Sweeney', 'kumaraditya', 'Crowthebird']
pr_nums = ['31867']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue47012'
versions = ['Python 3.11']

[kumaraditya303]

Benchmark and results are attached in the PR.

[sweeneyde]

New changeset bd1cf6e by Kumar Aditya in branch 'main':
bpo-47012: speed up iteration of bytes and bytearray (GH-31867)
bd1cf6e