Context

Using Context
- Adding a span to a context
- Accessing a span from a Context
- Contexts are immuutable, spans are not
- Watch out for nil
Deadlines and Spans
- Finishing Spans on Deadlines
- Do not Cancel contexts based on span finish
When not to use context
- Tracing Long-lived Objects
Higher level APIs
- Context-only APIs
- StartSpanFromContext(ctx context.Context, operationName string, opts …StartSpanOption) (Span, context.Context)
- Tag(context.Context)
- Log(context.Context)