# What's the easiest way to divide your data into equal-size pieces ?

You can split 150K data into 10K packets in just 40 ticks. This value was obtained on .NET4.8 (C# 7.3) on a personal computer. By the way there are 10,000 ticks in a millisecond.

You can use Parallel.For() or Parallel.Foreach() if you have **million** data. Parallel is defined in .Net 4.0 and above frameworks. ForEach loop runs on multiple threads and the processing takes place in a parallel manner.

```csharp
List<String> list = new List<String>();
for (int i = 0; i < 150001; i++)
{
    list.Add(i.ToString());
}

int chunkSize = 9999;

var numOfChunks = list.Count / chunkSize; // initial number of chunks
if (list.Count % chunkSize > 0) { numOfChunks++; } // add one chunk for remainder if there is a remainder
for (var i = 0; i <= numOfChunks; i++)
{
    var chunk = list.Skip(i * chunkSize).Take(chunkSize);
    // Do something with chunk, like writing to file
}
```