ComfyUI > Nodes > ComfyUI-UniversalToolkit > Lazy Switch KJ (UTK)

ComfyUI Node: Lazy Switch KJ (UTK)

Class Name

LazySwitchKJ_UTK

Category
UniversalToolkit/Tools
Author
whmc76 (Account age: 1110days)
Extension
ComfyUI-UniversalToolkit
Latest Updated
2026-03-16
Github Stars
0.07K

How to Install ComfyUI-UniversalToolkit

Install this extension via the ComfyUI Manager by searching for ComfyUI-UniversalToolkit
  • 1. Click the Manager button in the main menu
  • 2. Select Custom Nodes Manager button
  • 3. Enter ComfyUI-UniversalToolkit in the search bar
After installation, click the Restart button to restart ComfyUI. Then, manually refresh your browser to clear the cache and access the updated list of nodes.

Visit ComfyUI Online for ready-to-use ComfyUI environment

  • Free trial available
  • 16GB VRAM to 80GB VRAM GPU machines
  • 400+ preloaded models/nodes
  • Freedom to upload custom models/nodes
  • 200+ ready-to-run workflows
  • 100% private workspace with up to 200GB storage
  • Dedicated Support

Run ComfyUI Online

Lazy Switch KJ (UTK) Description

The `LazySwitchKJ_UTK` node optimizes workflows by using conditional logic for efficient execution.

Lazy Switch KJ (UTK):

The LazySwitchKJ_UTK node is a versatile tool within the ComfyUI Universal Toolkit designed to optimize workflow execution through conditional logic. It leverages lazy evaluation, a method that enhances performance by only processing the necessary branch of a workflow based on a boolean switch. This means that if a certain condition is not met, the corresponding branch of the workflow is not executed, thereby saving computational resources and time. This node is particularly beneficial in complex workflows where conditional execution can prevent unnecessary computations, making it an essential component for AI artists looking to streamline their processes. By supporting any data type, the LazySwitchKJ_UTK node offers flexibility and efficiency, allowing for seamless integration into various creative pipelines.

Lazy Switch KJ (UTK) Input Parameters:

switch

The switch parameter is a boolean input that determines which branch of the workflow will be executed. When set to True, the node evaluates and returns the on_true input; when set to False, it evaluates and returns the on_false input. This parameter is crucial for controlling the flow of execution and optimizing performance by ensuring only the necessary computations are performed. There are no minimum or maximum values as it is a boolean, but it defaults to either True or False based on the user's configuration.

on_false

The on_false parameter accepts any data type and represents the value or computation that will be returned when the switch is set to False. It is marked as lazy, meaning it will only be evaluated if the switch condition is False, thus avoiding unnecessary processing. This parameter is essential for defining the alternative path in conditional workflows, allowing for efficient branching and execution.

on_true

Similar to on_false, the on_true parameter also accepts any data type and is evaluated only when the switch is True. This lazy evaluation ensures that the node only processes the necessary data, contributing to performance optimization. The on_true parameter is used to define the primary path of execution when the condition specified by the switch is met.

Lazy Switch KJ (UTK) Output Parameters:

output

The output parameter is the result of the node's execution, returning the value from either the on_true or on_false input based on the switch condition. This output is crucial for determining the subsequent steps in a workflow, as it provides the necessary data or result that aligns with the specified condition. The flexibility of supporting any data type makes this output adaptable to various creative and computational scenarios.

Lazy Switch KJ (UTK) Usage Tips:

  • Use the LazySwitchKJ_UTK node to manage complex workflows where conditional logic is required, such as in A/B testing or when different processing paths are needed based on user input.
  • To maximize performance, ensure that the switch condition is set accurately to prevent unnecessary evaluations of the on_true or on_false branches.

Lazy Switch KJ (UTK) Common Errors and Solutions:

Missing Input Error

  • Explanation: This error occurs when one of the required inputs (switch, on_false, or on_true) is not provided.
  • Solution: Ensure that all necessary inputs are connected and that the switch parameter is correctly set to either True or False.

Type Mismatch Error

  • Explanation: This error arises when the data type of the on_false or on_true input does not match the expected type.
  • Solution: Verify that the inputs provided to on_false and on_true are of compatible types and align with the expected data type for the workflow.

Lazy Switch KJ (UTK) Related Nodes

Go back to the extension to check out more related nodes.
ComfyUI-UniversalToolkit
RunComfy
Copyright 2025 RunComfy. All Rights Reserved.

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.

Lazy Switch KJ (UTK)