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I recently updated my staging environment from 7.2.8 to 7.5.2 and, while pretty much everything runs smoothly, I did notice that previewing a page in Canvas Designer takes much longer than it used to do. My production server (which is still at 7.2.8) loads a preview in 750ms, which consistently requires 15-20 seconds on staging (7.5.2).
The preview toolbar loads fast, but it's the iframe content that seems to get stuck. Pretty much all my request is made up of a wait time during a redirect.
Outside of preview mode, the load times are always under 1 second for the same pages.
It reproduces 100% on any page with 7.5.2, staging and production servers both have the exact same specs. I tried to reproduce locally in Visual Studio, but load times are totally normal on my machine.
Does anybody have the same problem or ever encountered a similar issue?
I have the same problem, previews can take 60+s to load
Anyone have a solution for it?
I've tried updating to 7.5.3, then 7.5.4, but still no luck.
Tried that too, no luck
We've had the same problems since 7.2.2 with slow preview, unfortunately no solution - we avoid using it now due to the length of time it takes.
After further investigation, we've found out that our main navigation was causing the slowdown (GetUrl() method). There is a massive amount of links in that menu, maybe that explain why not everybody was experiencing the problem?
In any case, updating to 7.5.6 solved it! Preview times are now back to normal on our development server. I hope it will work for everybody!
I have this issue with Umbraco 7.6.1 :)
This is very sad. It seems the operation on disk is slow. On preview, Umbraco creates a preview xml file.
My big issue is that I am hosting in Azure Web App and I don't have SSD.
Any advice would be appreciated.
Did anyone find a solution for this?
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