# Optimization

> The activity of changing code or configuration to reduce the cost of a bottleneck that a measurement has located.

Record: `architecture:optimization`
Kind: activity
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Severity: contextual
Scope: code, database, system
Canonical: https://banes-lab.com/ontology#architecture-optimization

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Big O Notation](https://banes-lab.com/records/architecture/big-o-notation.md) and before [Profiling](https://banes-lab.com/records/architecture/profiling.md).

## Repair

- Refactored by: Optimize Bottleneck, Simplify After Optimization
- Detected by: complex code without performance evidence
- Violated by: optimizing without measured bottleneck
- Measured by: benchmark delta, SLO improvement
- Enforced by: benchmark review

## Requires

- [Profiling](https://banes-lab.com/records/architecture/profiling.md)
- [Bottleneck Evidence](https://banes-lab.com/records/lexicon/bottleneck-evidence.md)

## Reinforces

- [Performance Engineering](https://banes-lab.com/records/architecture/performance-engineering.md)

## Enables

- [Resource Efficiency](https://banes-lab.com/records/lexicon/resource-efficiency.md)

## Conflicts with

- [Premature Optimization](https://banes-lab.com/records/lexicon/premature-optimization.md)

## In tension with

- [Readability/Maintainability](https://banes-lab.com/records/lexicon/readability-maintainability.md)

## Tensions

- [Optimization / Readability/Maintainability](https://banes-lab.com/records/tension/optimization-readability-maintainability.md)

## Severity

- [contextual](https://banes-lab.com/records/vocabulary/severity-contextual.md)

## Category

- [Scalability / Performance / Optimization](https://banes-lab.com/records/architecture-category/scalability-performance-optimization.md)

## Reinforced by

- [Compile-Time Evaluation](https://banes-lab.com/records/architecture/compile-time-evaluation.md)
- [Bottleneck Analysis](https://banes-lab.com/records/architecture/bottleneck-analysis.md)

## Linked from

- [Architectural rules and principles](https://banes-lab.com/software-architecture/glossary/architectural-principles.md)
- [Metaprogramming / Language-Oriented Architecture](https://banes-lab.com/ontology/principles/architecture-category-metaprogramming-language-oriented-architecture.md)
- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/principles/architecture-category-scalability-performance-optimization.md)
- [Quality Attributes](https://banes-lab.com/ontology/lexicon/lexicon-category-quality-attributes.md)
- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/lexicon/lexicon-category-scalability-performance-optimization.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)