feat: 新增“如何看 JMH 性能对比测试结果”的文档

README.md

@@ -23,6 +23,42 @@
 * 更全：[时间工具类](https://github.com/duanluan/ZUtil/blob/main/src/main/java/top/zhogjianhao/date/DateUtils.java)近 120 个方法，2500+ 行；[正则工具类](https://github.com/duanluan/ZUtil/blob/main/src/main/java/top/zhogjianhao/regex/RegExUtils.java)近 50 个方法，750+ 行。其他工具类也在持续更新中……
 * 更安全：使用 JUnit 进行[套件测试](https://github.com/duanluan/ZUtil/tree/main/src/test/java/top/zhogjianhao/junit)，JaCoCo 进行[代码覆盖率测试](https://github.com/duanluan/ZUtil/tree/main/src/test/java/top/zhogjianhao/junit)，保证每行代码都符合预期，更少出 BUG。
 
+## 如何看 JMH 性能对比测试结果？
+
+```java
+// Benchmark                                                 Mode     Cnt    Score    Error   Units
+// ToPinyinTest.toPinyinByHutool                            thrpt       5    2.880 ±  0.160  ops/us
+// ToPinyinTest.toPinyinByZUtil                             thrpt       5    4.577 ±  0.133  ops/us
+// ToPinyinTest.toPinyinByHutool                             avgt       5    0.356 ±  0.012   us/op
+// ToPinyinTest.toPinyinByZUtil                              avgt       5    0.216 ±  0.006   us/op
+// ToPinyinTest.toPinyinByHutool                           sample  175058    0.435 ±  0.008   us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.00    sample            0.300            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.50    sample            0.400            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.90    sample            0.500            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.95    sample            0.500            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.99    sample            0.900            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.999   sample            1.600            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p0.9999  sample           40.900            us/op
+// ToPinyinTest.toPinyinByHutool:toPinyinByHutool·p1.00    sample          277.504            us/op
+// ToPinyinTest.toPinyinByZUtil                            sample  162384    0.393 ±  0.008   us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.00      sample            0.200            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.50      sample            0.300            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.90      sample            0.500            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.95      sample            0.600            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.99      sample            1.000            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.999     sample            2.500            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p0.9999    sample           45.425            us/op
+// ToPinyinTest.toPinyinByZUtil:toPinyinByZUtil·p1.00      sample          170.496            us/op
+// ToPinyinTest.toPinyinByHutool                               ss       5   30.880 ± 37.754   us/op
+// ToPinyinTest.toPinyinByZUtil                                ss       5   23.060 ± 16.885   us/op
+```
+
+Mode 即为`org.openjdk.jmh.annotations.Mode`，分为：
+* thrpt：**Throughput（吞吐量）**, ops/time，分数越大越好
+* avgt：**Average time（平均时间）**, time/op，分数越小越好
+* sample：**Sampling time（采样时间）**，分数越小越好
+* ss：**Single shot invocation time（单次调用时间）**：分数越小越好
+
 ## Maven：
 
 ```xml