Why does LINQ introduce hidden performance cliffs in production systems?

LINQ performance degrades suddenly when deferred execution, lazy loading, or unoptimized translations hit real data scale.

LINQ queries often appear efficient in development with small datasets. However, in production, deferred execution, lazy loading, and inefficient SQL translation create exponential performance degradation. These are called 'performance cliffs' because performance drops sharply after a threshold (data size, request volume, or join complexity).