Question

以下代码花费更多时间来降低整体应用程序性能。

 @Aspect
 @Component
 public class LoggingHandler {

/**
 * Logger initialization.
 *
 */
private final Logger logger = LoggerFactory.getLogger(LoggingHandler.class);

/**
 * Around advise for SlingAdapterImpl.
 * @param pjp joinPoint
 * @return response
 * @throws Throwable exception
 */
@Around("execution(* com.abcd.oicp.storage.client.impl.SlingAdapterImpl.*(..))")
public Object logAroundAllMethods(ProceedingJoinPoint pjp) throws Throwable {

    long startTime = Calendar.getInstance().getTimeInMillis();

    Object obj = null;
    try {
        obj = pjp.proceed();
    } finally {
        logger.info("Method={} Time taken={} micro secs", pjp.getSignature().getName(),
                    (TimeUnit.MILLISECONDS.toMicros(Calendar.getInstance().getTimeInMillis() - startTime)));
    }


    return obj;
 }
}

在JMeter中，耗时约1.5秒。为什么？

时间从毫秒转换为微秒a 绩效问题。

提前感谢。

Answer 1

使用System.nanoTime()或System.currentTimeMillis()代替Calendar.getInstance().getTimeInMillis()

AOP性能问题

1 个答案: