base64: encode without snprintf: a 29x speedup #10026
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For speed
Test setup
https://gist.github.com/bagder/baee5725e09a5977ef5b0471e2b3334f
Measurements
Best out three runs on my machine.
Old code: 5m55.291
New code: 12.254 seconds
A 28.99 times speedup.