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Using blender from the command line e.g. blender -b I see Time: 02:11.63 (Saving: 00:00.52)at the finished output.

What for is this part: (Saving: 00:00.52)?

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I assume it is the time to write the render result to disk, but --cycles-print-stats should give you a more detailed readout.

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  • $\begingroup$ That would make perfect sense, and thus is not so. It's not at all related to the disk i/o time. $\endgroup$ Dec 26, 2021 at 22:29
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The value is printed by the function do_write_image_or_movie that you can find in pipeline.c

There are no comments indicating what it should be, but it is the time it takes to print the "Time:..." part of the message plus the time it takes to execute any callbacks.

(I think that's a bug, but that's what it's actually printing.)

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