Review uses of "{b:02x}" to hex-encode bytes #19569
Description
Is your feature request related to a problem or challenge?
There are numerous places in the code where write! is used in conjunction with format string "{b:02x}". There are faster ways to write hex-encoded bytes. See #19568 for an example.
Describe the solution you'd like
No response
Describe alternatives you've considered
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Additional context
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