两种使用方法性能对比
Counter counter001 = Metrics.counter("count001");
counter001.increment();

Metrics.counter("count002").increment();

两者性能差10倍左右，推荐使用第一种写法


测试代码
https://gitee.com/dyyx/springboothello/blob/master/src/test/java/dyyx/MicrometerCountPerfTest.java

import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Metrics;
import io.micrometer.core.instrument.simple.SimpleMeterRegistry;

public class MicrometerCountPerfTest {
		
	private static final Counter counter001 = Metrics.counter("count001");
	private static final int NUM = 10000000;
	private static final int LOOP = 7;
	
	public static void main(String[] args) throws Exception {			       
		MeterRegistry registry = new SimpleMeterRegistry();
		Metrics.addRegistry(registry);
		
		System.out.println("count001");
		for(int i=0;i < LOOP;i++) {
			count001();
		}
		
		System.out.println("count002");
		for(int i=0;i < LOOP;i++) {
			count002();
		}
	}
	
	private static void count001() {
		long start = System.currentTimeMillis();
		for(int i=0;i < NUM;i++) {
			counter001.increment();
		}
		long end = System.currentTimeMillis();
		long time = end - start;
		System.out.println(time);

	}
	
	private static void count002() {
		long start = System.currentTimeMillis();
		for(int i=0;i < NUM;i++) {
			Metrics.counter("count002").increment();
		}
		long end = System.currentTimeMillis();
		long time = end - start;
		System.out.println(time);
	}
}


测试结果

count001
345
294
160
162
160
159
156
count002
2586
2148
2139
2500
4193
2257
2350

两者性能差10倍左右，推荐使用第一种写法


 micrometer使用