diff --git a/.gitignore b/.gitignore
index d325bc25e1..30a2780847 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@ __pycache__/
 ### Gradle ###
 .gradle
 **/build/
+local.properties
 
 # Unencrypted secret files
 google-services.json
@@ -20,6 +21,7 @@ gcs_key_file.json
 *_build/
 *cmake-build-debug/
 testing/test_framework/external/
+**/.externalNativeBuild/
 
 # XCode user specific folders
 **/xcuserdata/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ba7b8b7ad..940a215228 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -52,6 +52,9 @@ option(FIREBASE_INCLUDE_INSTALLATIONS
 option(FIREBASE_INCLUDE_MESSAGING
        "Include the Firebase Cloud Messaging library."
        ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})
+option(FIREBASE_INCLUDE_PERFORMANCE
+       "Include the Firebase Performance library."
+       ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})
 option(FIREBASE_INCLUDE_REMOTE_CONFIG
        "Include the Firebase Remote Config library."
        ${FIREBASE_INCLUDE_LIBRARY_DEFAULT})
@@ -620,6 +623,9 @@ endif()
 if (FIREBASE_INCLUDE_MESSAGING)
   add_subdirectory(messaging)
 endif()
+if (FIREBASE_INCLUDE_PERFORMANCE)
+  add_subdirectory(performance)
+endif()
 if (FIREBASE_INCLUDE_REMOTE_CONFIG)
   add_subdirectory(remote_config)
 endif()
diff --git a/ios_pod/Podfile b/ios_pod/Podfile
index 643c021a30..08a5f8db06 100644
--- a/ios_pod/Podfile
+++ b/ios_pod/Podfile
@@ -14,6 +14,7 @@ target 'GetPods' do
   pod 'Firebase/Functions', '8.8.0'
   pod 'Firebase/Installations', '8.8.0'
   pod 'Firebase/Messaging', '8.8.0'
+  pod 'Firebase/Performance', '8.8.0'
   pod 'Firebase/RemoteConfig', '8.8.0'
   pod 'Firebase/Storage', '8.8.0'
 
diff --git a/performance/CMakeLists.txt b/performance/CMakeLists.txt
new file mode 100644
index 0000000000..0b2409f386
--- /dev/null
+++ b/performance/CMakeLists.txt
@@ -0,0 +1,143 @@
+# Copyright 2019 Google
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# CMake file for the firebase_performance library
+
+# Common source files used by all platforms
+set(common_SRCS
+    src/performance_common.cc)
+
+# Source files used by the Android implementation.
+set(android_SRCS
+    ${performance_resources_source}
+    src/android/firebase_performance.cc
+    src/android/http_metric.cc
+    src/android/trace.cc)
+
+# Source files used by the iOS implementation.
+set(ios_SRCS
+    src/ios/firebase_performance.mm
+    src/ios/http_metric.mm
+    src/ios/trace.mm)
+
+# Source files used by the desktop implementation.
+set(desktop_SRCS
+    src/stubs/http_metric_stub.cc
+    src/stubs/performance_stub.cc
+    src/stubs/trace_stub.cc)
+
+if(ANDROID)
+  set(performance_platform_SRCS
+      "${android_SRCS}")
+elseif(IOS)
+  set(performance_platform_SRCS
+      "${ios_SRCS}")
+else()
+  set(performance_platform_SRCS
+        "${desktop_SRCS}")
+endif()
+
+if(ANDROID OR IOS)
+  set(additional_include_DIR)
+  set(additional_link_LIB)
+  set(additional_DEFINES)
+else()
+  set(additional_include_DIR
+      ${OPENSSL_INCLUDE_DIR})
+
+  set(additional_link_LIB
+      firebase_rest_lib
+      OpenSSL::SSL
+      OpenSSL::Crypto)
+
+  set(additional_DEFINES
+      -DFIREBASE_TARGET_DESKTOP=1)
+endif()
+
+if(MSVC)
+  set(additional_DEFINES
+    "${additional_DEFINES}"
+    -DWIN32_LEAN_AND_MEAN # Ensure that windows doesn't include winsock.h by
+                            # default, as it can cause issues when libraries try
+                            # to include winsock2.h later on in the process.
+  )
+endif()
+
+add_library(firebase_performance STATIC
+    ${common_SRCS}
+    ${performance_platform_SRCS})
+
+set_property(TARGET firebase_performance PROPERTY FOLDER "Firebase Cpp")
+
+# Set up the dependency on Firebase App.
+target_link_libraries(firebase_performance
+  PUBLIC
+    firebase_app
+  PRIVATE
+    ${additional_link_LIB}
+)
+# Public headers all refer to each other relative to the src/include directory,
+# while private headers are relative to the entire C++ SDK directory.
+target_include_directories(firebase_performance
+  PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/src/include
+  PRIVATE
+    ${FIREBASE_CPP_SDK_ROOT_DIR}
+    ${additional_include_DIR}
+)
+target_compile_definitions(firebase_performance
+  PRIVATE
+    -DINTERNAL_EXPERIMENTAL=1
+    ${additional_DEFINES}
+)
+# Automatically include headers that might not be declared.
+if(MSVC)
+  add_definitions(/FI"assert.h" /FI"string.h" /FI"stdint.h")
+else()
+  add_definitions(-include assert.h -include string.h)
+endif()
+
+if(ANDROID)
+  firebase_cpp_proguard_file(database)
+elseif(IOS)
+  # Enable Automatic Reference Counting (ARC) and Bitcode.
+  target_compile_options(firebase_performance
+                         PUBLIC "-fobjc-arc" "-fembed-bitcode")
+  target_link_libraries(firebase_performance
+                        PUBLIC "-fembed-bitcode")
+
+  setup_pod_headers(
+    firebase_performance
+    POD_NAMES
+      FirebaseCore
+      FirebasePerformance
+  )
+  if (FIREBASE_XCODE_TARGET_FORMAT STREQUAL "frameworks")
+    set_target_properties(firebase_performance PROPERTIES
+      FRAMEWORK TRUE
+    )
+  endif()
+endif()
+
+if(FIREBASE_CPP_BUILD_TESTS)
+  # Add the tests subdirectory
+  add_subdirectory(tests)
+endif()
+
+cpp_pack_library(firebase_performance "")
+cpp_pack_public_headers()
+if (NOT ANDROID AND NOT IOS)
+  cpp_pack_library(uv_a "deps/performance/external")
+  cpp_pack_library(libuWS "deps/performance/external")
+endif()
diff --git a/performance/build.gradle b/performance/build.gradle
new file mode 100644
index 0000000000..c8b63ae117
--- /dev/null
+++ b/performance/build.gradle
@@ -0,0 +1,94 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+buildscript {
+  repositories {
+    google()
+    jcenter()
+  }
+  dependencies {
+    classpath 'com.android.tools.build:gradle:3.3.3'
+  }
+}
+allprojects {
+  repositories {
+    google()
+    jcenter()
+  }
+}
+
+apply plugin: 'com.android.library'
+
+ext {
+  firebaseAndroidStl = System.getenv('FIREBASE_ANDROID_STL')
+  firebaseAndroidStl = firebaseAndroidStl != null ? firebaseAndroidStl : ''
+}
+
+android {
+  compileSdkVersion 28
+  buildToolsVersion '28.0.3'
+
+  sourceSets {
+    main {
+      manifest.srcFile '../android_build_files/AndroidManifest.xml'
+    }
+  }
+
+  externalNativeBuild {
+    cmake {
+      path '../CMakeLists.txt'
+    }
+  }
+
+  defaultConfig {
+    // This is the platform API where NativeActivity was introduced.
+    minSdkVersion 9
+    targetSdkVersion 28
+    versionCode 1
+    versionName "1.0"
+
+    buildTypes {
+      release {
+        minifyEnabled false
+      }
+    }
+
+    externalNativeBuild {
+      cmake {
+        targets 'firebase_performance'
+        // Args are: Re-use app library prebuilt by app gradle project.
+        //           Don't configure all the cmake subprojects.
+        //           Only include needed project.
+        arguments '-DFIREBASE_CPP_USE_PRIOR_GRADLE_BUILD=ON',
+                '-DFIREBASE_INCLUDE_LIBRARY_DEFAULT=OFF',
+                '-DFIREBASE_INCLUDE_PERFORMANCE=ON',
+		"-DFIREBASE_ANDROID_STL=${firebaseAndroidStl}"
+      }
+    }
+  }
+
+  lintOptions {
+    abortOnError false
+  }
+}
+
+dependencies {
+  implementation project(':app')
+}
+apply from: "$rootDir/android_build_files/android_abis.gradle"
+apply from: "$rootDir/android_build_files/extract_and_dex.gradle"
+apply from: "$rootDir/android_build_files/generate_proguard.gradle"
+project.afterEvaluate {
+  generateProguardFile('performance')
+}
diff --git a/settings.gradle b/settings.gradle
index 07828daea2..093aaf3aca 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -17,6 +17,7 @@ include ':app',
         ':installations',
         ':messaging',
         ':messaging:messaging_java',
+        ':performance',
         ':remote_config',
         ':storage',
         ':storage:storage_resources'
\ No newline at end of file