slog duration

No need for heavyweight tracing tools like X-ray, Jaeger or Zipkin. "slogd" measures the time for a function to return an error object.

Inspired by @tj's Apex logs's Trace function

• https://github.com/apex/log/blob/master/_examples/trace/trace.go
• https://github.com/apex/log/blob/8da83152b5d6177b4bfe3d12810a5afd25355170/entry.go#L142-L158

slogd example

Sample code:

slog.SetDefault(slog.New(slog.NewTextHandler(os.Stdout)))
url := "https://httpbin.org/delay/2"
var err error
// Caveat: Only one defer slogd per function!
defer slogd.New("fetching", "url", url).Stop(&err)
_, err = http.Get(url)

Sample output:

time=2023-02-10T20:21:46.564+08:00 level=INFO msg=fetching url=https://httpbin.org/delay/2 duration=3.716787544s