# Read Performance

> The degree to which normalizing a schema into many relations forces joins that slow reads.

Record: `lexicon:read-performance`
Kind: quality-attribute
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-read-performance

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Functional Dependencies](https://banes-lab.com/records/lexicon/functional-dependencies.md) and before [Ad-Hoc Permission Checks](https://banes-lab.com/records/lexicon/ad-hoc-permission-checks.md).

## Category

- [Schema / Canonical Data / Semantics](https://banes-lab.com/records/lexicon-category/schema-canonical-data-semantics.md)

## In tension with

- [Database Normalization](https://banes-lab.com/records/architecture/database-normalization.md)
- [Database Normalization / Read Performance](https://banes-lab.com/records/tension/database-normalization-read-performance.md)

## Linked from

- [Schema / Canonical Data / Semantics](https://banes-lab.com/ontology/principles/architecture-category-schema-canonical-data-semantics.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)