A log/slog handler for pretty console output, designed to be used during development time only.
This repository is a fork of dusted-go/logging, focusing exclusively on the prettylog handler for development use. The original repository included additional handlers for production logging (stackdriver) which have been removed in this fork to maintain a single, focused purpose.
import (
"log/slog"
"github.com/mikluko/slogging"
)
prettyHandler := slogging.NewHandler(&slog.HandlerOptions{
Level: slog.LevelInfo,
AddSource: false,
ReplaceAttr: nil,
})
logger := slog.New(prettyHandler)This handler is designed for development use. Run go test -bench=. to benchmark on your system.
goos: darwin
goarch: arm64
pkg: github.com/mikluko/slogging
cpu: Apple M4 Pro
BenchmarkHandlers/StandardJSONHandler-14 2933217 395.7 ns/op 0 B/op 0 allocs/op
BenchmarkHandlers/StandardTextHandler-14 2657721 440.9 ns/op 0 B/op 0 allocs/op
BenchmarkHandlers/SloggingHandler-14 668452 1784 ns/op 1420 B/op 37 allocs/op
BenchmarkHandlers/SloggingHandlerWithColor-14 554329 2124 ns/op 1798 B/op 49 allocs/op
BenchmarkHandlers/SloggingHandlerYAML-14 339201 3351 ns/op 8091 B/op 63 allocs/op
Key takeaways:
- ~4-5x slower than standard handlers due to JSON parsing and formatting
- Significant memory allocations for pretty formatting
- YAML encoding is considerably more expensive than JSON
- Colorization adds ~15% overhead
Use this handler for development/debugging only. For production, use standard slog.JSONHandler or slog.TextHandler.