How effective is Thread.sleep (long)?

Question

Let's say I want to “pause” a thread so that other threads can work more efficiently. What is the minimum sleep period before blocking, becomes meaningless (or almost meaningless)?

Answer 1

I would expect that any amount of sleep will at least be the functional equivalent of a call yield(), so there is never a point where it is "pointless". There is definitely a point where small values ​​are substantially indistinguishable, because the overhead of waiting for the operating system to return to your thread is more than a short sleep time. This probably happens somewhere in the range of 5-10, but, of course, it will be OS-specific.

Answer 2

This is difficult to generalize and will depend on your specific problem. But I would not sleep on my own to control the flows. You can put threads in Executorand let them control them. You can also use PriorityQueue to accomplish your tasks.

Answer 3

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