Multiple text effects cause re-render

[breese]

While I have added this to Github (#4646) I thought I would see if anyone else has this problem.

I have a simple 10 minute Non-music sequence with 1 picture and multiple text effects.
A full render takes about 110 seconds.
Problem is, if I click on one of the text effects, the sequence gets rendered again, click on another one, and its blank until the rendering has completed (again about 110 seconds).
I have done
Render - Save
Tried multiple options for Hardware Video Decoding including Disabling it.

I understand I can always click the Suspend Render, but do not understand why clicking a text effect without making any changes causes it to re-render over and over again.
I am including the sequence, Xlights log file, and 2 screenshots.
Thanks for the time.

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[Poporacer]

but do not understand why clicking a text effect without making any changes causes it to re-render over and over again.

xLights doesn't render in the background or it would be terrible to work with. When you play a sequence it will try to render on the fly. When you click on an effect, xLights will render that effect immediately. But there is a lot that has to go on when rendering. Looking at the pic you posted, it looks like you have 5 layers and xLights will render layers from the bottom up.
And what might be going on is:
1. You have a large matrix
2. You have an effect that runs the entire length of the sequence on layer 5 (this is probably the biggest cause)

So, when you click on any of those text effects, xLights has to render ALL effects that fall within the timeframe of the text effect that you clicked on. 
That means that it will have to render the picture (Layer 5) for the entire timeframe that the picture effect is on the timeline. Then it will render each of the text effects on each layer. 
I think that might be what is going on?

[breese]

My understanding of this:
Once you do a Full Render, save, just clicking on an effect should not cause the effect or sequence to re-render unless something changed.
Is that not what the Render Cache is all about?

It seems to work this way in other sequences yet this one with Text effects and a single picture (yes on bottom) acts like no other......

[dkulp]

My understanding of this:
Once you do a Full Render, save, just clicking on an effect should not cause the effect or sequence to re-render unless something changed.

Nope.  Not how it works at all.  Whenever you click on an effect, it triggers a render.   Always.

Is that not what the Render Cache is all about?

Not at all.   The Render Cache has absolutely nothing to do with this scenario at all.   The Render Cache stores results of individual effects, not everything blended together with the layers and such.