介绍两种方式。
一、使用antcontrib提供的listener
命令示例：
ant main -listener net.sf.antcontrib.perf.AntPerformanceListener
统计数据输出到文件（可选）：-Dperformance.log=/tmp/performance.log
输出示例：
Buildfile: D:\ant-test\build.xml
hello:
[echo] 你好
main:
[echo] 世界
BUILD SUCCESSFUL
Total time: 0 seconds
Statistics:
-------------- Target Results ---------------------
demo.main: 0.000 sec
demo.hello: 0.006 sec
-------------- Task Results -----------------------
demo.main.echo: 0.000 sec
demo.hello.echo: 0.006 sec
demo.<implicit>.path: 0.016 sec
demo.<implicit>.property: 0.089 sec
-------------- Totals -----------------------------
Start time: 星期二, 9 八月 2022 11:31:04.365
Stop time: 星期二, 9 八月 2022 11:31:04.588
Total time: 0.223 sec
二、使用ProfileLogger
ant main -logger org.apache.tools.ant.listener.ProfileLogger
效果：
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (78ms)
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (2ms)
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (0ms)
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (1ms)
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (1ms)
property: started Tue Aug 09 11:21:18 CST 2022
property: finishedTue Aug 09 11:21:18 CST 2022 (1ms)
path: started Tue Aug 09 11:21:18 CST 2022
path: finishedTue Aug 09 11:21:18 CST 2022 (18ms)
Target hello: started Tue Aug 09 11:21:18 CST 2022
echo: started Tue Aug 09 11:21:18 CST 2022
[echo] 你好
echo: finishedTue Aug 09 11:21:18 CST 2022 (5ms)
Target hello: finishedTue Aug 09 11:21:18 CST 2022 (7ms)
Target main: started Tue Aug 09 11:21:18 CST 2022
echo: started Tue Aug 09 11:21:18 CST 2022
[echo] 世界
echo: finishedTue Aug 09 11:21:18 CST 2022 (1ms)
Target main: finishedTue Aug 09 11:21:18 CST 2022 (2ms)
BUILD SUCCESSFUL
Total time: 0 seconds
