[refactor] - base64 decoder #3762
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Description:
This PR refactors the base64 decoder. During the investigation of a client-reported CPU usage issue, profiling revealed that base64 decoding accounted for about ~6 seconds in a 30-second profile. The change required relatively low effort but delivers noticeable improvements.
Benchmarks
Checklist:
make test-community
)?make lint
this requires golangci-lint)?