---
title: "MTPerformancePresets | Mobile sdk | Mobile sdk ios | Ios"
description: "Performance-oriented presets for MapTiler Swift SDK."
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# MTPerformancePresets

```
public enum MTPerformancePresets
```

Performance-oriented presets for MapTiler Swift SDK.

-   `[leanPerformance(base:)](#/s:11MapTilerSDK20MTPerformancePresetsO15leanPerformance4baseAA12MTMapOptionsVAG_tFZ)`
    
    Lean performance preset: prioritize responsiveness and bytes over fidelity.
    
    Applied overrides (favor performance over fidelity):
    
    -   pixelRatio = 1.0
    -   shouldRefreshExpiredTiles = false
    -   cancelPendingTileRequestsWhileZooming = true
    -   maxTileCacheZoomLevels = 4.0 (if unset)
    -   crossSourceCollisionsAreEnabled = false
    -   eventLevel = ESSENTIAL (keeps low-frequency events; per-frame events opt-in)
    -   highFrequencyEventThrottleMs = 150 (when ALL is enabled)
    
    #### Declaration
    
    Swift
    
    ```
    public static func leanPerformance(base: MTMapOptions = MTMapOptions()) -> MTMapOptions
    ```
    
-   `[balancedPerformance(base:)](#/s:11MapTilerSDK20MTPerformancePresetsO19balancedPerformance4baseAA12MTMapOptionsVAG_tFZ)`
    
    Returns a new \[MTMapOptions\] based on \[base\] with balanced performance defaults.
    
    Keeps crisper rendering by using a higher pixel ratio.
    
    Applied overrides:
    
    -   pixelRatio = base.pixelRatio ?: 1.5 (sharper than 1.0)
    -   shouldRefreshExpiredTiles = false
    -   cancelPendingTileRequestsWhileZooming = true
    -   maxTileCacheZoomLevels = 4.0 (if unset)
    -   crossSourceCollisionsAreEnabled = false
    -   eventLevel = ESSENTIAL (per-frame events opt-in)
    -   highFrequencyEventThrottleMs = 150 (when ALL is enabled)
    
    #### Declaration
    
    Swift
    
    ```
    public static func balancedPerformance(base: MTMapOptions = MTMapOptions()) -> MTMapOptions
    ```
    
-   `[highFidelity(base:)](#/s:11MapTilerSDK20MTPerformancePresetsO12highFidelity4baseAA12MTMapOptionsVAG_tFZ)`
    
    Returns a new \[MTMapOptions\] based on \[base\] tuned for higher-end devices.
    
    Focuses on visual fidelity while keeping sensible performance guardrails.
    
    Applied overrides:
    
    -   pixelRatio = base.pixelRatio ?: 2.0 (very crisp; test for memory on low-end)
    -   shouldRefreshExpiredTiles = true (prefer up-to-date tiles)
    -   cancelPendingTileRequestsWhileZooming = false (allow progressive detail during zoom)
    -   maxTileCacheZoomLevels = 6.0 (if unset) to reduce churn when navigating
    -   crossSourceCollisionsAreEnabled = base.crossSourceCollisionsAreEnabled ?: true
    -   eventLevel = ALL
    -   highFrequencyEventThrottleMs = 100 (slightly more responsive when ALL is enabled)
    
    #### Declaration
    
    Swift
    
    ```
    public static func highFidelity(base: MTMapOptions = MTMapOptions()) -> MTMapOptions
    ```