new WaitForSeconds() caching

[smitdylan2001]

Problem statement

new WaitForSeconds() and the other coroutine yield functions create garbage. Some of these yield functions are cachable, which will reduce garbage allocation, thus improving performance.

Proposed solution

IEnumerator Coroutine()
{
yield return new WaitForSeconds(2f);
}

to

WaitForSeconds _wait2Seconds = new WaitForSeconds(2f);

IEnumerator Coroutine()
{
yield return _wait2Seconds;
}

Same for similar methods

[smitdylan2001]

This can only be done when the value (time) is hardcoded and no variable is used