For what reasons is the initial stack size for threads usually set to 2 MB?

The initial stack size for threads at 2 MB is chosen as a compromise between several factors:

• Large enough for most tasks: 2 MB is usually sufficient for recursive calls, local variables, and working with stack frames without overflow.
• Memory usage optimization: a too large stack would lead to excessive memory consumption, especially with a large number of threads.
• Compatibility with OS and architecture: 2 MB is a common size supported by many OSes and platforms, ensuring stability and predictability.

In Go, the stack of goroutines dynamically grows and shrinks, but the initial size is set at 2 MB to balance performance and memory efficiency.