[skip ci] docs

docs/perf/index.md

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+---
+title: Performance Monitoring
+description: Firebase Performance Monitoring is a service that helps you to gain insight into the performance characteristics of your iOS and Android apps. 
+---
+
+# Cloud Functions
+
+React Native Firebase provides native integration with Performance Monitoring to gain insight into 
+key performance characteristics within your React Native application. The library works out of the box, 
+however provides a simple API to track custom trace and HTTP request metrics.
+
+<Youtube id="0EHSPFvH7vk" />
+
+## Install
+
+To get started, install the module on your platform:
+
+<Grid columns="2">
+	<Block
+		title="Android"
+		to="/{{ version }}/perf/installation#android"
+	>
+    Follow the Android installation guide.
+	</Block>
+	<Block
+		title="iOS"
+		to="/{{ version }}/perf/installation#ios"
+	>
+		Follow the iOS installation guide.
+	</Block>
+</Grid>
+
+## Getting Started
+
+<Grid>
+	<Block
+		icon="build"
+		color="#ffc107"
+		title="Quick Start"
+		to="/{{ version }}/functions/quick-start"
+	>
+    Start tracking key performance metrics within your application.
+	</Block>
+	<Block
+		icon="school"
+		color="#4CAF50"
+		title="Guides"
+		to="/guides?tag=perf"
+	>
+	  Our guides walk you through some of the ways Performance Monitoring can be to gain deeper insight into your applications 
+    performance.
+	</Block>
+  <Block
+		icon="layers"
+		color="#03A9F4"
+		title="Reference"
+		to="/{{ version }}/perf/reference"
+	>
+    The API reference covers everything required to successfully monitor your apps performance.
+	</Block>
+</Grid>
+
+## Learn more
+
+Our documentation is a great place to start, however if you're looking for more help or want to help others, 
+check out the resources below:
+
+- [Stack Overflow](https://stackoverflow.com/questions/tagged/react-native-firebase-perf)
+- [Github Issues](https://github.com/invertase/react-native-firebase/issues?utf8=%E2%9C%93&q=is%3Aissue+sort%3Aupdated-desc+label%3Aperf+)
+- [Firebase Documentation](https://firebase.google.com/docs/perf-mon?utm_source=invertase&utm_medium=react-native-firebase&utm_campaign=perf-mon)

docs/perf/installation.md

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+---
+title: Installation
+description: Installing Firebase Performance Monitoring for Android & iOS
+---
+
+# Installation
+
+TODO
+

docs/perf/quick-start.md

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+---
+title: Quick Start
+description: Get to grips with the basics of Performance Monitoring in React Native Firebase
+---
+
+# Performance Monitoring Quick Start
+
+## Module usage
+
+TODO
+
+## Custom Tracing
+
+## HTTP Request Tracing
+