import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@BeforeExperiment void setUp() {
  if (emptySetProportion + singletonSetProportion > 1.01) {
    throw new SkipThisScenarioException();
  }

  Random rng = new Random();
  for (int i = 0; i < 0x1000; i++) {
    double setSize = rng.nextDouble();
    if (setSize < emptySetProportion) {
      sets[i] = ImmutableSet.of();
    } else if (setSize < emptySetProportion + singletonSetProportion) {
      sets[i] = ImmutableSet.of(PRESENT);
    } else {
      sets[i] = ImmutableSet.of(PRESENT, new Object());
    }

    if (rng.nextDouble() < hitRate) {
      queries[i] = PRESENT;
    } else {
      queries[i] = ABSENT;
    }
  }
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@BeforeExperiment
void setUp() {
  if (emptySetProportion + singletonSetProportion > 1.01) {
    throw new SkipThisScenarioException();
  }

  Random rng = new Random();
  for (int i = 0; i < 0x1000; i++) {
    double setSize = rng.nextDouble();
    if (setSize < emptySetProportion) {
      sets[i] = ImmutableSet.of();
    } else if (setSize < emptySetProportion + singletonSetProportion) {
      sets[i] = ImmutableSet.of(PRESENT);
    } else {
      sets[i] = ImmutableSet.of(PRESENT, new Object());
    }

    if (rng.nextDouble() < hitRate) {
      queries[i] = PRESENT;
    } else {
      queries[i] = ABSENT;
    }
  }
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@BeforeExperiment
public void doBefore() {
  recursionCount = stackDepth - new Throwable().getStackTrace().length - 1;
  if (recursionCount < 0) {
    throw new SkipThisScenarioException();
  }
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@Override
MeanAndVariance variance(double[] values, MeanAlgorithm meanAlgorithm) {
  if (meanAlgorithm != MeanAlgorithm.KNUTH) {
    throw new SkipThisScenarioException();
  }
  double mean = values[0];
  double s = 0.0;
  for (int i = 1; i < values.length; i++) {
    double nextMean = mean + (values[i] - mean) / (i + 1);
    s += (values[i] - mean) * (values[i] - nextMean);
    mean = nextMean;
  }
  return new MeanAndVariance(mean, s / values.length);
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@Override
Object operate(Stream<?> stream) {
  try {
    return stream.collect(MoreCollectors.onlyElement());
  } catch (IllegalArgumentException | NoSuchElementException e) {
    throw new SkipThisScenarioException();
  }
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@BeforeExperiment void setUp() throws Exception {
  if (state != State.NOT_DONE && (numListeners != 0 || numThreads != 0)) {
    throw new SkipThisScenarioException();
  }
}
 

import com.google.caliper.api.SkipThisScenarioException; //导入依赖的package包/类
@BeforeExperiment
void setUp() throws Exception {
  if (state != State.NOT_DONE && (numListeners != 0 || numThreads != 0)) {
    throw new SkipThisScenarioException();
  }
}