Are you talking about Houdini viewports slowdowns while the IPR is rendering? We have improved the IPR/viewports response in the latest 4.02 and 2018.1 builds, but of course, more work can be done for sure. In any case usually, the Houdini viewports performance is better while the IPR is rendering if you have the display GPU disabled, or at least configured with low priority in the plugin options panel, GPU settings.
juanjgon wrote:You can't disable the display GPU because it seems that you only have one GPU, but you have the "Priority" flag disabled, so you "Low" priority level is not applied to the GPU. You have the "Priority" checkbox between the enable and tone map checkboxes, in this same GPU settings panel. Remember to close the IPR window and open it again to apply any change to the GPUs configuration.
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