DataDog · ncreated · Jan 7, 2021 · Jan 4, 2021 · Jan 5, 2021 · Jan 5, 2021
@@ -36,6 +36,8 @@ struct ExampleAppConfiguration: AppConfiguration {
                 environment: "tests"
             )
             .set(serviceName: serviceName)
+            .set(batchSize: .small)
+            .set(uploadFrequency: .frequent)
 
         // If the app was launched with test scenarion ENV, apply the scenario configuration
         if let testScenario = testScenario {
@@ -75,6 +77,8 @@ struct UITestsAppConfiguration: AppConfiguration {
                 environment: "integration"
             )
             .set(serviceName: "ui-tests-service-name")
+            .set(batchSize: .small)
+            .set(uploadFrequency: .frequent)
 
         let serverMockConfiguration = Environment.serverMockConfiguration()
 

@@ -115,7 +115,11 @@ extension FeaturesConfiguration {
             applicationBundleIdentifier: appContext.bundleIdentifier ?? "unknown",
             serviceName: configuration.serviceName ?? appContext.bundleIdentifier ?? "ios",
             environment: try ifValid(environment: configuration.environment),
-            performance: .best(for: appContext.bundleType)
+            performance: PerformancePreset(
+                batchSize: configuration.batchSize,
+                uploadFrequency: configuration.uploadFrequency,
+                bundleType: appContext.bundleType
+            )
         )
 
         if configuration.loggingEnabled {

@@ -68,56 +68,80 @@ internal struct PerformancePreset: Equatable, StoragePerformancePreset, UploadPe
     let minUploadDelay: TimeInterval
     let maxUploadDelay: TimeInterval
     let uploadDelayChangeRate: Double
+}
 
-    // MARK: - Predefined presets
-
-    /// Default performance preset.
-    static let `default` = lowRuntimeImpact
-
-    /// Performance preset optimized for low runtime impact.
-    /// Minimalizes number of data requests send to the server.
-    static let lowRuntimeImpact = PerformancePreset(
-        // persistence
-        maxFileSize: 4 * 1_024 * 1_024, // 4MB
-        maxDirectorySize: 512 * 1_024 * 1_024, // 512 MB
-        maxFileAgeForWrite: 4.75,
-        minFileAgeForRead: 4.75 + 0.5, // `maxFileAgeForWrite` + 0.5s margin
-        maxFileAgeForRead: 18 * 60 * 60, // 18h
-        maxObjectsInFile: 500,
-        maxObjectSize: 256 * 1_024, // 256KB
+internal extension PerformancePreset {
+    init(
+        batchSize: Datadog.Configuration.BatchSize,
+        uploadFrequency: Datadog.Configuration.UploadFrequency,
+        bundleType: BundleType
+    ) {
+        let meanFileAgeInSeconds: TimeInterval = {
+            switch (bundleType, batchSize) {
+            case (.iOSApp, .small): return 5
+            case (.iOSApp, .medium): return 15
+            case (.iOSApp, .large): return 60
+            case (.iOSAppExtension, .small): return 1
+            case (.iOSAppExtension, .medium): return 3
+            case (.iOSAppExtension, .large): return 12
+            }
+        }()
 
-        // upload
-        initialUploadDelay: 5, // postpone to not impact app launch time
-        defaultUploadDelay: 5,
-        minUploadDelay: 1,
-        maxUploadDelay: 20,
-        uploadDelayChangeRate: 0.1
-    )
+        let minUploadDelayInSeconds: TimeInterval = {
+            switch (bundleType, uploadFrequency) {
+            case (.iOSApp, .frequent): return 1
+            case (.iOSApp, .average): return 5
+            case (.iOSApp, .rare): return 10
+            case (.iOSAppExtension, .frequent): return 0.5
+            case (.iOSAppExtension, .average): return 1
+            case (.iOSAppExtension, .rare): return 5
+            }
+        }()
 
-    /// Performance preset optimized for instant data delivery.
-    /// Minimalizes the time between receiving data form the user and delivering it to the server.
-    static let instantDataDelivery = PerformancePreset(
-        // persistence
-        maxFileSize: `default`.maxFileSize,
-        maxDirectorySize: `default`.maxDirectorySize,
-        maxFileAgeForWrite: 2.75,
-        minFileAgeForRead: 2.75 + 0.5, // `maxFileAgeForWrite` + 0.5s margin
-        maxFileAgeForRead: `default`.maxFileAgeForRead,
-        maxObjectsInFile: `default`.maxObjectsInFile,
-        maxObjectSize: `default`.maxObjectSize,
+        let uploadDelayFactors: (initial: Double, default: Double, min: Double, max: Double, changeRate: Double) = {
+            switch bundleType {
+            case .iOSApp:
+                return (
+                    initial: 5,
+                    default: 5,
+                    min: 1,
+                    max: 10,
+                    changeRate: 0.1
+                )
+            case .iOSAppExtension:
+                return (
+                    initial: 0.5, // ensures the the first upload is checked quickly after starting the short-lived app extension
+                    default: 3,
+                    min: 1,
+                    max: 5,
+                    changeRate: 0.5 // if batches are found, reduces interval significantly for more uploads in short-lived app extension
+                )
+            }
+        }()
 
-        // upload
-        initialUploadDelay: 0.5, // send quick to have a chance for upload in short-lived app extensions
-        defaultUploadDelay: 3,
-        minUploadDelay: 1,
-        maxUploadDelay: 5,
-        uploadDelayChangeRate: 0.5 // reduce significantly for more uploads in short-lived app extensions
-    )
+        self.init(
+            meanFileAge: meanFileAgeInSeconds,
+            minUploadDelay: minUploadDelayInSeconds,
+            uploadDelayFactors: uploadDelayFactors
+        )
+    }
 
-    static func best(for bundleType: BundleType) -> PerformancePreset {
-        switch bundleType {
-        case .iOSApp: return `default`
-        case .iOSAppExtension: return instantDataDelivery
-        }
+    init(
+        meanFileAge: TimeInterval,
+        minUploadDelay: TimeInterval,
+        uploadDelayFactors: (initial: Double, default: Double, min: Double, max: Double, changeRate: Double)
+    ) {
+        self.maxFileSize = 4 * 1_024 * 1_024 // 4MB
+        self.maxDirectorySize = 512 * 1_024 * 1_024 // 512 MB
+        self.maxFileAgeForWrite = meanFileAge * 0.95 // 5% below the mean age
+        self.minFileAgeForRead = meanFileAge * 1.05 //  5% above the mean age
+        self.maxFileAgeForRead = 18 * 60 * 60 // 18h
+        self.maxObjectsInFile = 500
+        self.maxObjectSize = 256 * 1_024 // 256KB
+        self.initialUploadDelay = minUploadDelay * uploadDelayFactors.initial
+        self.defaultUploadDelay = minUploadDelay * uploadDelayFactors.default
+        self.minUploadDelay = minUploadDelay * uploadDelayFactors.min
+        self.maxUploadDelay = minUploadDelay * uploadDelayFactors.max
+        self.uploadDelayChangeRate = uploadDelayFactors.changeRate
     }
 }
@@ -14,6 +14,27 @@ extension Datadog {
 
     /// Datadog SDK configuration.
     public struct Configuration {
+        /// Defines the Datadog SDK policy when batching data together before uploading it to Datadog servers.
+        /// Smaller batches mean smaller but more network requests, whereas larger batches mean fewer but larger network requests.
+        public enum BatchSize {
+            /// Prefer small sized data batches.
+            case small
+            /// Prefer medium sized data batches.
+            case medium
+            /// Prefer large sized data batches.
+            case large
+        }
+
+        /// Defines the frequency at which Datadog SDK will try to upload data batches.
+        public enum UploadFrequency {
+            /// Try to upload batched data frequently.
+            case frequent
+            /// Try to upload batched data with a medium frequency.
+            case average
+            /// Try to upload batched data rarely.
+            case rare
+        }
+
         public enum DatadogEndpoint {
             /// US based servers.
             /// Sends data to [app.datadoghq.com](https://app.datadoghq.com/).
@@ -152,6 +173,8 @@ extension Datadog {
         private(set) var rumSessionsSamplingRate: Float
         private(set) var rumUIKitViewsPredicate: UIKitRUMViewsPredicate?
         private(set) var rumUIKitActionsTrackingEnabled: Bool
+        private(set) var batchSize: BatchSize
+        private(set) var uploadFrequency: UploadFrequency
 
         /// Creates the builder for configuring the SDK to work with RUM, Logging and Tracing features.
         /// - Parameter rumApplicationID: RUM Application ID obtained on Datadog website.
@@ -209,7 +232,9 @@ extension Datadog {
                     firstPartyHosts: nil,
                     rumSessionsSamplingRate: 100.0,
                     rumUIKitViewsPredicate: nil,
-                    rumUIKitActionsTrackingEnabled: false
+                    rumUIKitActionsTrackingEnabled: false,
+                    batchSize: .medium,
+                    uploadFrequency: .average
                 )
             }
 
@@ -425,6 +450,22 @@ extension Datadog {
                 return self
             }
 
+            /// Sets the preferred size of batched data uploaded to Datadog servers.
+            /// This value impacts the size and number of requests performed by the SDK.
+            /// - Parameter batchSize: `.medium` by default.
+            public func set(batchSize: BatchSize) -> Builder {
+                configuration.batchSize = batchSize
+                return self
+            }
+
+            /// Sets the preferred frequency of uploading data to Datadog servers.
+            /// This value impacts the frequency of performing network requests by the SDK.
+            /// - Parameter uploadFrequency: `.average` by default.
+            public func set(uploadFrequency: UploadFrequency) -> Builder {
+                configuration.uploadFrequency = uploadFrequency
+                return self
+            }
+
             /// Builds `Datadog.Configuration` object.
             public func build() -> Configuration {
                 return configuration

@@ -54,6 +54,36 @@ public class DDTracesEndpoint: NSObject {
     public static func custom(url: String) -> DDTracesEndpoint { .init(sdkEndpoint: .custom(url: url)) }
 }
 
+@objc
+public enum DDBatchSize: Int {
+    case small
+    case medium
+    case large
+
+    internal var swiftType: Datadog.Configuration.BatchSize {
+        switch self {
+        case .small: return .small
+        case .medium: return .medium
+        case .large: return .large
+        }
+    }
+}
+
+@objc
+public enum DDUploadFrequency: Int {
+    case frequent
+    case average
+    case rare
+
+    internal var swiftType: Datadog.Configuration.UploadFrequency {
+        switch self {
+        case .frequent: return .frequent
+        case .average: return .average
+        case .rare: return .rare
+        }
+    }
+}
+
 @objcMembers
 public class DDConfiguration: NSObject {
     internal let sdkConfiguration: Datadog.Configuration
@@ -157,6 +187,14 @@ public class DDConfigurationBuilder: NSObject {
         _ = sdkBuilder.trackUIKitActions(true)
     }
 
+    public func set(batchSize: DDBatchSize) {
+        _ = sdkBuilder.set(batchSize: batchSize.swiftType)
+    }
+
+    public func set(uploadFrequency: DDUploadFrequency) {
+        _ = sdkBuilder.set(uploadFrequency: uploadFrequency.swiftType)
+    }
+
     public func build() -> DDConfiguration {
         return DDConfiguration(sdkConfiguration: sdkBuilder.build())
     }

@@ -12,11 +12,15 @@ private struct DateCorrectorMock: DateCorrectorType {
     }
 }
 
+extension PerformancePreset {
+    static let benchmarksPreset = PerformancePreset(batchSize: .small, uploadFrequency: .frequent, bundleType: .iOSApp)
+}
+
 extension FeaturesCommonDependencies {
     static func mockAny() -> Self {
         return .init(
             consentProvider: ConsentProvider(initialConsent: .granted),
-            performance: .default,
+            performance: .benchmarksPreset,
             httpClient: HTTPClient(),
             mobileDevice: .current,
             dateProvider: SystemDateProvider(),

@@ -58,7 +58,7 @@ class LoggingStorageBenchmarkTests: XCTestCase {
         }
 
         // Wait enough time for `reader` to accept the youngest batch file
-        Thread.sleep(forTimeInterval: PerformancePreset.default.minFileAgeForRead + 0.1)
+        Thread.sleep(forTimeInterval: PerformancePreset.benchmarksPreset.minFileAgeForRead + 0.1)
 
         measureMetrics([.wallClockTime], automaticallyStartMeasuring: false) {
             self.startMeasuring()

@@ -58,7 +58,7 @@ class RUMStorageBenchmarkTests: XCTestCase {
         }
 
         // Wait enough time for `reader` to accept the youngest batch file
-        Thread.sleep(forTimeInterval: PerformancePreset.default.minFileAgeForRead + 0.1)
+        Thread.sleep(forTimeInterval: PerformancePreset.benchmarksPreset.minFileAgeForRead + 0.1)
 
         measureMetrics([.wallClockTime], automaticallyStartMeasuring: false) {
             self.startMeasuring()

@@ -58,7 +58,7 @@ class TracingStorageBenchmarkTests: XCTestCase {
         }
 
         // Wait enough time for `reader` to accept the youngest batch file
-        Thread.sleep(forTimeInterval: PerformancePreset.default.minFileAgeForRead + 0.1)
+        Thread.sleep(forTimeInterval: PerformancePreset.benchmarksPreset.minFileAgeForRead + 0.1)
 
         measureMetrics([.wallClockTime], automaticallyStartMeasuring: false) {
             self.startMeasuring()

@@ -104,16 +104,21 @@ class FeaturesConfigurationTests: XCTestCase {
         verify(invalidEnvironmentName: String(repeating: "a", count: 197))
     }
 
-    func testPerformance() throws {
-        let iOSAppConfiguration = try FeaturesConfiguration(
-            configuration: .mockAny(), appContext: .mockWith(bundleType: .iOSApp)
-        )
-        XCTAssertEqual(iOSAppConfiguration.common.performance, .lowRuntimeImpact)
-
-        let iOSAppExtensionConfiguration = try FeaturesConfiguration(
-            configuration: .mockAny(), appContext: .mockWith(bundleType: .iOSAppExtension)
-        )
-        XCTAssertEqual(iOSAppExtensionConfiguration.common.performance, .instantDataDelivery)
+    func testPerformancePreset() throws {
+        try BatchSize.allCases
+            .combined(with: UploadFrequency.allCases)
+            .combined(with: BundleType.allCases)
+            .map { ($0.0, $0.1, $1) }
+            .forEach { batchSize, uploadFrequency, bundleType in
+                let actualPerformancePreset = try FeaturesConfiguration(
+                    configuration: .mockWith(batchSize: batchSize,uploadFrequency: uploadFrequency),
+                    appContext: .mockWith(bundleType: bundleType)
+                ).common.performance
+
+                let expectedPerformancePreset = PerformancePreset(batchSize: batchSize, uploadFrequency: uploadFrequency, bundleType: bundleType)
+
+                XCTAssertEqual(actualPerformancePreset, expectedPerformancePreset)
+            }
     }
 
     func testEndpoint() throws {