Why logger isdebugenabled

This will not incur the cost of whatever the toString method needs to do if debugging is disabled. On the other hand, if the logger is enabled for the debug level, it will incur twice the cost of evaluating whether the logger is enabled or not: once in isDebugEnabled and once in debug. Certain users resort to pre-processing or compile-time techniques to compile out all log statements. This leads to perfect performance efficiency with respect to logging. However, since the resulting application binary does not contain any log statements, logging cannot be turned on for that binary.

This seems to be a disproportionate price to pay in exchange for a small performance gain. Unlike Log4j, Log4j 2 Loggers don't "walk a hierarchy". Loggers point directly to the Logger configuration that best matches the Logger's name. This incurs extra overhead when the Logger is first created but reduces the overhead every time the Logger is used.

This is the cost of formatting the log output and sending it to its target destination. Here again, a serious effort was made to make layouts formatters perform as quickly as possible. The same is true for appenders. One of the fundamental tenets of Log4j 2 is to use immutable objects whenever possible and to lock at the lowest granularity possible. However, the cost of actually formatting and delivering log events will never be insignificant. For example, the results of writing to a simple log file using the same format using Log4j, Logback and Log4j 2 are:.

As with many of the other results on this page the differences between the frameworks above should be considered insignificant. The values will change somewhat on each execution and changing the order the frameworks are tested or adding calls to System.

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This is the preferred style of logging. Alternatively if your logger is available statically then the is debug enabled state can be stored in a static variable like this:.

This way the debug enabled state is only queried once when the class is loaded. Assert java. Java Code Examples for org. Logger isDebugEnabled The following examples show how to use org. Logger isDebugEnabled. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar. Source Project: jhipster-registry File: LoggingAspect.

Source Project: glowroot File: DataSource. Source Project: spring-cache-self-refresh File: LoggingAspect. Source Project: x7 File: LoggerProxy.