Add the boost QoS hack that doesn't really make any change

https://developer.apple.com/forums/thread/682769

Author: intitni

Copilot for Xcode/App.swift

@@ -1,6 +1,7 @@
+import Client
 import SwiftUI
-import XPCShared
 import UpdateChecker
+import XPCShared
 
 @main
 struct CopilotForXcodeApp: App {
@@ -11,6 +12,10 @@ struct CopilotForXcodeApp: App {
                 .preferredColorScheme(.dark)
                 .onAppear {
                     UserDefaults.setupDefaultSettings()
+                    Task {
+                        let service = try getService()
+                        await service.boostQoS()
+                    }
                 }
                 .environment(\.updateChecker, UpdateChecker(hostBundle: Bundle.main))
         }
@@ -21,7 +26,7 @@ struct CopilotForXcodeApp: App {
 var isPreview: Bool { ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] == "1" }
 
 struct UpdateCheckerKey: EnvironmentKey {
-    static var defaultValue: UpdateChecker = UpdateChecker(hostBundle: nil)
+    static var defaultValue: UpdateChecker = .init(hostBundle: nil)
 }
 
 extension EnvironmentValues {
@@ -30,5 +35,3 @@ extension EnvironmentValues {
         set { self[UpdateCheckerKey.self] = newValue }
     }
 }
-
-

Core/Sources/Client/AsyncXPCService.swift

@@ -1,6 +1,7 @@
 import CopilotModel
 import Foundation
 import XPCShared
+import Logger
 
 public struct AsyncXPCService {
     public var connection: NSXPCConnection { service.connection }
@@ -10,6 +11,15 @@ public struct AsyncXPCService {
         self.service = service
     }
 
+    public func boostQoS() async {
+        let service = connection.remoteObjectProxyWithErrorHandler {
+            Logger.client.error($0)
+        } as! XPCServiceProtocol
+        service.boostQoS {
+            // never reply
+        }
+    }
+
     public func checkStatus() async throws -> CopilotStatus {
         try await withXPCServiceConnected(connection: connection) {
             service, continuation in
@@ -170,23 +180,23 @@ public struct AsyncXPCService {
             }
         }
     }
-    
+
     public func explainSelection(editorContent: EditorContent) async throws -> UpdatedContent? {
         try await suggestionRequest(
             connection,
             editorContent,
             { $0.explainSelection }
         )
     }
-    
+
     public func chatWithSelection(editorContent: EditorContent) async throws -> UpdatedContent? {
         try await suggestionRequest(
             connection,
             editorContent,
             { $0.chatWithSelection }
         )
     }
-    
+
     public func promptToCode(editorContent: EditorContent) async throws -> UpdatedContent? {
         try await suggestionRequest(
             connection,

Core/Sources/Service/XPCService.swift

@@ -20,6 +20,12 @@ var workspaces = [URL: Workspace]()
 var inflightRealtimeSuggestionsTasks = Set<Task<Void, Never>>()
 
 public class XPCService: NSObject, XPCServiceProtocol {
+    var boostQoS = [Any]()
+    
+    public func boostQoS(withReply reply: @escaping () -> Void) {
+        boostQoS.append(reply)
+    }
+    
     // MARK: - Service
 
     public func getXPCServiceVersion(withReply reply: @escaping (String, String) -> Void) {

Core/Sources/XPCShared/XPCServiceProtocol.swift

@@ -3,6 +3,7 @@ import Foundation
 
 @objc(XPCServiceProtocol)
 public protocol XPCServiceProtocol {
+    func boostQoS(withReply reply: @escaping () -> Void)
     func checkStatus(withReply reply: @escaping (String?, Error?) -> Void)
     func signInInitiate(withReply reply: @escaping (String?, String?, Error?) -> Void)
     func signInConfirm(

EditorExtension/SourceEditorExtension.swift

@@ -29,6 +29,7 @@ class SourceEditorExtension: NSObject, XCSourceEditorExtension {
             try await Task.sleep(nanoseconds: 1_000_000_000)
             let service = try getService()
             _ = try await service.checkStatus()
+            await service.boostQoS()
         }
         #endif
     }