Question 1

How does Onelog compare to zerolog in performance?

Accepted Answer

Onelog often outperforms zerolog in benchmarks, especially for disabled logging where it achieves zero allocations and sub-nanosecond operations. However, zerolog has a larger ecosystem and more community support, which might be preferable for integrations.

Question 2

How to add a custom timestamp to every log in Onelog?

Accepted Answer

Use the Hook method to attach a function that adds a time field. For example: logger.Hook(func(e onelog.Entry) { e.String("time", time.Now().Format(time.RFC3339)) }). This dynamically injects the timestamp into all log entries.

Question 3

Is Onelog thread-safe for concurrent logging?

Accepted Answer

Logger instances are designed for concurrent use, but global configuration changes via functions like onelog.LevelText are not thread-safe. Ensure such changes are made once at application startup to avoid data races.

Question 4

Does Onelog support log rotation or file splitting natively?

Accepted Answer

No, Onelog does not include built-in log rotation. You need to handle it externally by using an io.Writer with a rotating file library, such as lumberjack, which adds setup complexity.

Question 5

What are the main advantages of bitwise level control in Onelog?

Accepted Answer

Bitwise operations allow efficient enabling and disabling of multiple log levels with a single integer, reducing overhead and providing fine-grained control. This is useful for dynamic level adjustments in performance-critical apps.

Question 6

How to benchmark Onelog against other Go loggers?

Accepted Answer

Refer to the benchmark suites linked in the README, such as the one from zerolog's author or Uber's suite. These include Onelog comparisons for disabled logging, basic messages, and fields, helping you assess performance in your context.

onelog

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