Custom_Partition_Benchmark.java

 @Benchmark
public void C3_hugeListStreamPartitioned() {
  final List<List<Integer>> result = list.stream()
    .collect(partitioned(chunkSize));
  
  assertThat(result).hasSize(expectedSize);
  assertThat(result.get(chunkIndex)).isEqualTo(expectedChunk);
}

@Benchmark
public void C4_hugeListToPartition() {
  final List<List<Integer>> result = Partition.ofSize(list, chunkSize); //Here Using Custom Partition Class
  assertThat(result).hasSize(expectedSize);
  assertThat(result.get(chunkIndex)).isEqualTo(expectedChunk);
}