`sips -- scriptable image processing system` is not releasing memory after Resampling image. 

```
find /Users/parag/Desktop/image -iname "*.jp*g" -or -iname "*.gif" -or -iname "*.ti*f" -or -iname "*.png" -print0| xargs -0 sips -Z 800 -p 800 800

```

Every time my system free memory goes down whereas the inactive memory shoots up and it reamins the same even when the command has finished execution. My Image folder contain 300 images. 
why does't the memory get freed ??

Before running the command  

![enter image description here](https://i.stack.imgur.com/D4aJ6.png) 

After
![enter image description here](https://i.stack.imgur.com/WuNuW.png)