LoopProgress - ComfyUI Built-in Node Documentation - ComfyUI

LoopProgress is a development-only helper node that reports the progress of a loop to the ComfyUI server interface. On each execution it sends the text “Iteration X / Y” to the client and returns the current iteration position unchanged, which allows it to sit inline inside a loop without altering the data flow.

Inputs

Parameter	Description	Data Type	Required	Range
`start_id`	Identifier of the prompt/loop instance the progress message belongs to. The first item of the supplied list is used to route the progress text to the correct running execution.	STRING	Yes	-
`position`	The current iteration position (index). The first item of the supplied list is used in the progress message and is also returned as the output.	INT	Yes	-
`total`	The total number of iterations. Used together with `position` to build the “Iteration X / Y” progress message.	INT	Yes	-

Note: this node is declared with list inputs (is_input_list=True) and accepts all inputs, so each connected value is treated as a list and only its first element is read. The node always runs (its input fingerprint is fixed), so it re-executes on every loop pass.

Outputs

Output Name	Description	Data Type
`position`	The current iteration position, passed through unchanged from the `position` input.	INT

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