Object pooling revisited
- Game Development course
- Expert
- Lesson 10/47
- 4 min
Deepen object pooling use for memory.
What is object pooling?
Object pooling is the technique of keeping objects in a pool and reusing them instead of destroying them. When an object in the pool finishes its job it is not destroyed; it is deactivated and later used again. This way constant allocation and collection cost drops.
gameObject.SetActive(false); // deactivate instead of destroy
nesne = havuzdakiNesne; // reuseA pool is ideal for objects created frequently.
How does a pool work?
A pool keeps prepared objects in a list. When needed an object is taken from the list, and when the job is done it is given back. Using an old object instead of producing a new one is far more efficient for memory.
int yeniNesne = 1;
int yenidenKullanilan = 4;Thanks to the pool the allocation count drops and the game runs smoother.
Practice Report the pool saving
In a class named HavuzTakip, define an integer field named yeniNesne with the value 1 and an integer field named yenidenKullanilan with the value 4. In the Start method add these two values into an integer named toplam and print the text "Havuz tasarrufu: " joined with toplam using Debug.Log.
Starter code
using UnityEngine;
public class HavuzTakip : MonoBehaviour
{
// yeniNesne adli tam sayi alanini 1, yenidenKullanilan adli tam sayi alanini 4 degeriyle tanimla
void Start()
{
// bu iki degeri toplayip toplam adli tam sayiya ata
// "Havuz tasarrufu: " + toplam biciminde yazdir
}
}Sample solution
using UnityEngine;
public class HavuzTakip : MonoBehaviour
{
int yeniNesne = 1;
int yenidenKullanilan = 4;
void Start()
{
int toplam = yeniNesne + yenidenKullanilan;
Debug.Log("Havuz tasarrufu: " + toplam);
}
}Expected output
Havuz tasarrufu: 5
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Why is object pooling used?
- To soften the lights in the scene
- To reduce new allocations and reuse objects Correct answer
- To increase the number of code lines
- To compile files faster
Explanation: A pool uses old objects instead of producing new ones, which lowers the allocation count.
2 Deactivate the object
gameObject.SetActive(____); // nesne yok edilmez, pasif yapilir gameObject.SetActive(false); // nesne yok edilmez, pasif yapilirExplanation: SetActive(false) deactivates the object; the pooled object is set aside without being destroyed.
3 Pool terms
| Term | Meaning |
|---|---|
Havuz (pool) |
The list where objects are reused |
Yeniden kullanma |
Taking an old object instead of new |
SetActive(false) |
Deactivating the object |
Tahsis tasarrufu |
The reduced amount of allocation |