lazyfighter opened a new issue #1310: Can we optimize SystemLock just like alibaba/sentinel-core URL: https://github.com/apache/rocketmq/issues/1310 ```java public class SystemClock { public long now() { return System.currentTimeMillis(); } } public final class TimeUtil { private static volatile long currentTimeMillis; static { currentTimeMillis = System.currentTimeMillis(); Thread daemon = new Thread(new Runnable() { @Override public void run() { while (true) { currentTimeMillis = System.currentTimeMillis(); try { TimeUnit.MILLISECONDS.sleep(1); } catch (Throwable e) { } } } }); daemon.setDaemon(true); daemon.setName("sentinel-time-tick-thread"); daemon.start(); } public static long currentTimeMillis() { return currentTimeMillis; } } ```
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