What is busy spinning in Java?

Busy spinning is a waiting strategy in which a thread just wait in a loop, without releasing the CPU just by going to sleep. By not releasing the CPU or suspending the thread, your thread retains all the cached data and instruction, which may be lost if the thread was suspended and resumed back in a different core of CPU.

This is popular in high-frequency low latency programming domain, where programmers are trying for extremely low latency in the range of micro to milliseconds.

private volatile boolean isDone = false;

public void waitUntilDone() {
while (!isDone) {
Thread.sleep(1000);
}

}

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.