perf: Improve performance of proxy Interceptor logging

[valfirst]

Change list

Improve performance of proxy Interceptor logging

Types of changes

What types of changes are you proposing/introducing to Java client?

• No changes in production code.
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[mykola-mokhnach]

Could you please provide some links to actual performance comparisons/documentation?

[valfirst]

That's a recommendation from SLF4J: https://www.slf4j.org/faq.html#logging_performance

[mykola-mokhnach]

That's a recommendation from SLF4J: https://www.slf4j.org/faq.html#logging_performance

If I read it right the tutorial above advices something like logger.debug("The new entry is {}.", entry);

[valfirst]

If I read it right the tutorial above advices something like logger.debug("The new entry is {}.", entry);

Right, that's a major improvement: replace String.format with parametrised message.

Also PR uses fluent logging approach (https://www.slf4j.org/manual.html#fluent), it allows to calculate logged values lazily (only if logging for the particular level is enabled).