@Override
    public void flushAsync() {
        XLog.i("flush async");
        if (mExe == null) {
            IO.execute(mFlusher);
        } else {
            mExe.execute(mFlusher);
        }
    }
Flush data too many times, may drain battery.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/persist/StringMapRepo.java