---
title: HitchTimeRatio
framework: MetricKit
role: symbol
role_heading: Class
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+]
path: metrickit/hitchtimeratio
---

# HitchTimeRatio

A unit for animation hitch time ratio measurements.

## Declaration

```swift
@objc final class HitchTimeRatio
```

## Mentioned in

Analyzing app performance with MetricKit

## Discussion

Discussion ratio and hitchTimeRatio use this dimension type, both of type Measurement<HitchTimeRatio>. The base unit represents the total time spent hitching over the total duration of the tracked interval, with symbol "ms per s".

## Topics

### Type Methods

- [baseUnit()](metrickit/hitchtimeratio/baseunit().md)

## Relationships

### Inherits From

- [Dimension](foundation/dimension.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Supporting types

- [Histogram](metrickit/histogram.md)
- [AverageStatistics](metrickit/averagestatistics.md)
- [SignalBars](metrickit/signalbars.md)
- [OSVersion](metrickit/osversion.md)