initialize user profile on its own thread. getting the bundle for each impression event is costing at least 3ms.

Author: thomaszurkan-optimizely

OptimizelySDK/Customization/DefaultUserProfileService.swift

@@ -74,18 +74,21 @@ import Foundation
 open class DefaultUserProfileService: OPTUserProfileService {
     public typealias UserProfileData = [String: UPProfile]
 
-    var profiles: UserProfileData
+    var profiles: UserProfileData?
     let lock = DispatchQueue(label: "com.optimizely.UserProfileService")
     let kStorageName = "user-profile-service"
 
     public required init() {
-        profiles = UserDefaults.standard.dictionary(forKey: kStorageName) as? UserProfileData ?? UserProfileData()
+        lock.async {
+            self.profiles = UserDefaults.standard.dictionary(forKey: self.kStorageName) as? UserProfileData ?? UserProfileData()
+
+        }
     }
 
     open func lookup(userId: String) -> UPProfile? {
         var retVal: UPProfile?
         lock.sync {
-            retVal = profiles[userId]
+            retVal = profiles?[userId]
         }
         return retVal
     }
@@ -94,7 +97,7 @@ open class DefaultUserProfileService: OPTUserProfileService {
         guard let userId = userProfile[UserProfileKeys.kUserId] as? String else { return }
 
         lock.async {
-            self.profiles[userId] = userProfile
+            self.profiles?[userId] = userProfile
             let defaults = UserDefaults.standard
             defaults.set(self.profiles, forKey: self.kStorageName)
             defaults.synchronize()

OptimizelySDK/Utils/Utils.swift

@@ -10,6 +10,8 @@ import Foundation
 
 class Utils {
 
+    static var sdkVersion:String?
+    
     // @objc NSNumber can be casted either Bool, Int, or Double
     // more filtering required to avoid NSNumber(false, true) interpreted as Int(0, 1) instead of Bool
 
@@ -120,11 +122,16 @@ class Utils {
         // - Bundle(identifier: bundleIdentifier) works ok consistently
         // - CocoaPods uses its own bundle identifier, so let it use Bundle(for:) as a fallback
         //   CocoaPods copies "s.version" in podspec to "CFBundleShortVersionString" in its own Info.plist file
+        if let sdkVersion = sdkVersion {
+            return sdkVersion
+        }
 
         let bundle = Bundle(identifier: "com.optimizely.OptimizelySwiftSDK") ?? Bundle(for: OptimizelyManager.self)
         guard let version = bundle.infoDictionary!["CFBundleShortVersionString"] as? String else {
             fatalError("Check if SDK framework identifier is correct")
         }
+        
+        sdkVersion = version
 
         return version
     }