OperationTimelane 0.9.0

OperationTimelane 0.9.0

Maintained by Marin Todorov.


Timelane Icon

OperationTimelane provides an API allowing you to debug your Operation based asynchronous code visually in the Timelane Instrument.

Timelane Instrument



Debugging specific operation

Import the OperationTimelane framework in your code:

import OperationTimelane

Use the lane(_) function to "activate" an operation for debugging in Timelane when you are creating the operation:

let op = MyOperation().lane("My Operation")

Then profile your project by clicking Product > Profile in Xcode's main menu.

Select the Timelane Instrument template:

Timelane Instrument Template

Inspect your operations on the interactive timeline:

Timelane Live Recording

Debugging specific operation queue

OperationTimelane offers a custom operation queue which automatically logs any added operations in Timelane. (No swizzling in favor of a custom type.)

Create a LaneOperationQueue (in other words replace your existing queue with) like so and then add operations as usual:

let myQueue = LaneOperationQueue(name: "My Queue")


All of the added operations will be visualized in Timelane like in the previous section.

For a more detailed walkthrough go to http://timelane.tools.

API Reference


Use lane("Lane name") to send data to both the subscriptions and events lanes in the Timelane Instrument.

lane("Lane name", filter: [.subscriptions]) sends begin/completion events to the Subscriptions lane.

lane("Lane name", filter: [.events]) sends events and values to the Events lane.


Use this function if you want to log a value for the current operation in Timelane.


Temporarily replace your own operation queue with this type to debug its operations in Timelane.


Swift Package Manager

I . Automatically in Xcode:

  • Click File > Swift Packages > Add Package Dependency...
  • Use the package URL https://github.com/icanzilb/OperationTimelane to add TimelaneCombine to your project.

II . Manually in your Package.swift file add:

.package(url: "https://github.com/icanzilb/OperationTimelane", .from("1.0.0"))


CocoaPods is a dependency manager for Cocoa projects. For usage and installation instructions, visit their website. To integrate OperationTimelane into your Xcode project using CocoaPods, add it to your Podfile:

pod 'OperationTimelane', '~> 1.0'


Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. To integrate OperationTimelane into your Xcode project using Carthage, add it in your Cartfile:

github "icanzilb/OperationTimelane" "1.0"


This repo contains a simple demo app. To give it a try open OperationTimelane/OperationTimelane.xcodeproj and run the "OperationTimelaneDemo" scheme.

Timelane demo app


Copyright (c) Marin Todorov 2020 This package is provided under the MIT License.