sometime output twice, sometime output once

[t_liang]

# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why1


# Run progress: 0.00% complete, ETA 00:03:02
# Fork: 1 of 1
Iteration   1: why1 0.994 ops/s




Result "indi.liang.pref.CommJmhTest.why1":
  0.994 ops/s




# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why2


# Run progress: 0.55% complete, ETA 00:04:28
# Fork: 1 of 1
Iteration   1: why2 0.998 ops/s




--------------------------------------------------------
# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why1


# Run progress: 0.00% complete, ETA 00:03:02
# Fork: 1 of 1
Iteration   1: why1 why1 0.997 ops/s




Result "indi.liang.pref.CommJmhTest.why1":
  0.997 ops/s




# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why2


# Run progress: 0.55% complete, ETA 00:07:20
# Fork: 1 of 1
Iteration   1: why2 why2 0.998 ops/s


-----------------------------------------




# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why1


# Run progress: 0.00% complete, ETA 00:03:02
# Fork: 1 of 1
Iteration   1: why1 0.999 ops/s




Result "indi.liang.pref.CommJmhTest.why1":
  0.999 ops/s




# JMH 1.17.5 (released 10 days ago)
# VM version: JDK 1.8.0_66, VM 25.66-b17
# VM invoker: D:\Genuitec\MyEclipse 2016\binary\com.sun.java.jdk8.win32.x86_1.8.0.u66\jre\bin\java.exe
# VM options: -Xms512m -Xmx512m -Dfile.encoding=UTF-8
# Warmup: <none>
# Measurement: 1 iterations, 1 s each
# Timeout: 600 s per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Throughput, ops/time
# Benchmark: indi.liang.pref.CommJmhTest.why2


# Run progress: 0.55% complete, ETA 00:04:20
# Fork: 1 of 1
Iteration   1: why2 why2 0.989 ops/s