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Add a sentence on Edge vs APIs

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melindafekete 2025-03-12 11:38:01 +01:00
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@ -31,6 +31,8 @@ Server-side SDKs run in backend applications and retrieve feature flag configura
Client-side SDKs are used in frontend and mobile applications. They communicate with Unleash through the [Frontend API](#frontend-api). Supported platforms include: [JavaScript](/reference/sdks/javascript-browser), [React](/reference/sdks/react), [iOS](/reference/sdks/ios-proxy), [Android](/reference/sdks/android-proxy), and more. Client-side SDKs are used in frontend and mobile applications. They communicate with Unleash through the [Frontend API](#frontend-api). Supported platforms include: [JavaScript](/reference/sdks/javascript-browser), [React](/reference/sdks/react), [iOS](/reference/sdks/ios-proxy), [Android](/reference/sdks/android-proxy), and more.
For improved performance and scalability, SDKs can connect to the [Unleash service](#the-unleash-api) through [Unleash Edge](#unleash-edge) instead of directly using the Frontend and Client APIs.
SDKs cache all feature flag data in memory, applying activation strategies locally. This makes flag evaluation incredibly fast, as it is a simple function operating on local state, without the need to poll data from the database. This architecture results in a small delay (typically a few seconds, but configurable) when propagating configuration changes to your applications. SDKs cache all feature flag data in memory, applying activation strategies locally. This makes flag evaluation incredibly fast, as it is a simple function operating on local state, without the need to poll data from the database. This architecture results in a small delay (typically a few seconds, but configurable) when propagating configuration changes to your applications.
### Unleash Edge ### Unleash Edge