One Unity method that stops making garbage.
The problem
Reading .tag makes a string.
void OnTriggerEnter( Collider other ){ if ( other.tag == "Enemy" ) TakeDamage();}
Every time you read .tag, Unity creates a brand new string.
Why it matters
Garbage causes hitches.
Each new string is garbage. When the garbage collector cleans up, the game can stutter for a frame.
- 1 trigger
- 1 new string
- 100 triggers a second
- 100 new strings
The fix
Use CompareTag.
void OnTriggerEnter( Collider other ){ if ( other.CompareTag( "Enemy" ) ) TakeDamage();}
Same answer, no new string.
The rule
Compare tags. Don't read them.
- Checking a tag
- CompareTag
- Reading .tag
- allocates
- Matters most
- triggers, Update