What additional features and capabilities were introduced in context methods with the release of Go 1.21?

In Go 1.21, improvements were added to the context package that expand context management capabilities:

• Support for cancellation with timeout and deadline has become more flexible.
• New functions have been added for convenient merging of multiple contexts.
• Performance has been improved and memory consumption reduced when working with contexts.

For example, you can now create contexts that automatically cancel when multiple conditions are met, simplifying lifecycle management of operations:

ctx1, cancel1 := context.WithCancel(context.Background())
ctx2, cancel2 := context.WithTimeout(context.Background(), time.Second*10)

ctx := context.Merge(ctx1, ctx2) // hypothetical function for merging

// Use ctx in requests or goroutines

// Cancel both contexts
cancel1()
cancel2()

(Note that the exact syntax and functions may vary, as new features depend on the specific implementation in Go 1.21.)