Unity Game Optimization - Third Edition

String concatenation

Concatenation is the act of appending strings to one another to form a larger string. As you've learned, any such cases are likely to result in excess heap allocations. The biggest offender in a string-based memory waste is concatenating strings using the + operator and += operators, because of the allocation chaining effect they cause.

For example, the following code tries to combine a group of string objects together to print some information about a combat result:

void CreateFloatingDamageText(DamageResult result) {  string outputText = result.attacker.GetCharacterName() + "              dealt " + result.totalDamageDealt.ToString() + " " +              result.damageType.ToString() + " damage to " +  result.defender.GetCharacterName() + " (" ...