我正在使用http://openjdk.java.net/projects/code-tools/jmh/进行基准测试,我得到的结果如下:
Benchmark Mode Samples Score Score error Units o.a.f.c.j.b.TestClass.test1 avgt 5 2372870,600 210897,743 us/op o.a.f.c.j.b.TestClass.test2 avgt 5 2079931,850 394727,671 us/op o.a.f.c.j.b.TestClass.test3 avgt 5 26585,818 21105,739 us/op o.a.f.c.j.b.TestClass.test4 avgt 5 19113,230 8012,852 us/op o.a.f.c.j.b.TestClass.test5 avgt 5 2586,413 1949,487 us/op o.a.f.c.j.b.TestClass.test6 avgt 5 1942,963 1619,967 us/op o.a.f.c.j.b.TestClass.test7 avgt 5 233,902 73,861 us/op o.a.f.c.j.b.TestClass.test8 avgt 5 191,970 126,682 us/op
“得分误差”一栏究竟是什么意思以及如何解释它?
答案 0 :(得分:21)
这是分数的误差范围。在大多数情况下,这是confidence interval的一半。想想看,好像“得分”和“得分错误”之间有“±”符号。事实上,人类可读的日志将显示:
Result: 1.986 ±(99.9%) 0.009 ops/ns [Average]
Statistics: (min, avg, max) = (1.984, 1.986, 1.990), stdev = 0.002
Confidence interval (99.9%): [1.977, 1.995]
# Run complete. Total time: 00:00:12
Benchmark Mode Samples Score Score error Units
o.o.j.s.HelloWorld.hello thrpt 5 1.986 0.009 ops/ns