我有一个相当大的双精度数组,例如1,71,00,000个元素。我需要遍历该数组,将数组分成大小为10k点的较小数组和剩余点(如果有)切片到最后一片。
我有一个基本代码:
public static boolean getSliceOfArray(double[] arr,int slice_len)
{
//arr: big array
//slice_len: 10,000
System.out.println(arr.length);
int n_times=(arr.length/slice_len);
int i=0;
for(int n=0;n<n_times;n++)
{
Arrays.copyOfRange(arr,i,i+slice_len);
i=i+slice_len;
}
System.out.println(n_times);
if(i!=arr.length)
{
System.out.println( Arrays.copyOfRange(arr,i,arr.length).length);
}
return true;
}
以下是输出结果:
I/System.out: 17100000
I/xample.styleap: Waiting for a blocking GC Alloc
I/xample.styleap: WaitForGcToComplete blocked Alloc on HeapTrim for 13.428ms
Starting a blocking GC Alloc
I/xample.styleap: Waiting for a blocking GC Alloc
I/xample.styleap: WaitForGcToComplete blocked Alloc on HeapTrim for 36.867ms
I/xample.styleap: Starting a blocking GC Alloc
I/xample.styleap: Waiting for a blocking GC Alloc
I/xample.styleap: WaitForGcToComplete blocked Alloc on HeapTrim for 26.012ms
Starting a blocking GC Alloc
I/xample.styleap: Waiting for a blocking GC Alloc
I/xample.styleap: WaitForGcToComplete blocked Alloc on HeapTrim for 32.625ms
Starting a blocking GC Alloc
I/xample.styleap: Waiting for a blocking GC Alloc
I/xample.styleap: WaitForGcToComplete blocked Alloc on HeapTrim for 21.645ms
Starting a blocking GC Alloc
I/System.out: 1710
当我使用相对较小的数组时,输出并非如此。为什么会显示“Waiting for a blocking GC Alloc”和这些消息?这是一个严重的问题吗?是JVM的问题还是我的逻辑错误?
System.gc()
。 - Aniket Sahrawat