# Per-Instance Duplicate State

> Storing identical shared state separately in every object instance, wasting memory at high object counts.

Record: `lexicon:per-instance-duplicate-state`
Kind: anti-pattern
Layer: [Design Patterns Core](https://banes-lab.com/records/layer/design-patterns-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-per-instance-duplicate-state

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Leaky Subsystem API](https://banes-lab.com/records/lexicon/leaky-subsystem-api.md) and before [Subclass Explosion](https://banes-lab.com/records/lexicon/subclass-explosion.md).

## Category

- [Structural Patterns](https://banes-lab.com/records/lexicon-category/structural-patterns.md)

## Negated by

- [Flyweight Pattern](https://banes-lab.com/records/architecture/flyweight-pattern.md)

## Linked from

- [Structural Patterns](https://banes-lab.com/ontology/principles/architecture-category-structural-patterns.md)