Benchmark Data

Warnings

Suggested

DurationMillis slog.Duration() logs milliseconds instead of nanoseconds

The slog.JSONHandler uses nanoseconds for time.Duration but some other handlers use seconds.

Go issue 59345: Nanoseconds is a recent change with Go 1.21

Phsym Zerolog

Samber Zerolog

DurationSeconds slog.Duration() logs seconds instead of nanoseconds

The slog.JSONHandler uses nanoseconds for time.Duration but some other handlers use seconds.

Go issue 59345: Nanoseconds is a recent change with Go 1.21

Chanchal Zap

Samber Zap

DurationString slog.Duration() logs a string representation instead of nanoseconds

The slog.JSONHandler uses nanoseconds for time.Duration but some other handlers use a string representation.

Svcrunner Jsonlog

1m0s

TimeMillis slog.Time() logs milliseconds instead of nanoseconds

The slog.JSONHandler uses nanoseconds for time.Time but some other handlers use milliseconds. This does not apply to the basic time field, only attribute fields. I can't find any supporting documentation or bug on this but Go issue 59345 (see previous warning) may have fixed this as well in Go 1.21.

Chanchal Zap		2025-02-16T01:41:19Z

Phsym Zerolog		2025-02-16T01:41:19Z

Samber Zap		2025-02-16T01:41:19Z

Samber Zerolog		2025-02-16T01:41:19Z

Test Log Attributes

Warnings