Page Edit - the speed problem only applies to editing pages. Saving often times out.
Our hosting service also looked into the matter to to determine whether this relates to the server. But no.
Here is was lead to the problem.
On Saturday 5 Oct about 40 basic pages were created - containing Toolset Blocks.
Method: Clone the first page, rename the clone, add its image (22.9 kB). Saving the new page. The WP system was not noticeably slower than usual.
The pages are very small, and forms will be added to them in the next development phase.
A page consists only of a heading with heading text, the image, a descriptive paragraph (less than 100 words) and a Toolset Grid block.
We closed down Sunday. On Monday 7 October when we began editing Pages, the Page Edit section became very slow, and saving often edit timed out.
We did all the standard general troubleshooting - clean cache, deactivate/activate plugins, network speed, etc, etc.
It cannot be a general WP problem, as this happens only for Pages.
We did a time test:
* Opening the Media Library from the WP Dashboard takes 6 seconds
* Opening All Posts from WP Dashboard takes 6 seconds
* The list of Pages takes 6 sec to load
* All other links from WP Dashboard seem to load as usual
However
* Opening a specific page to Edit takes 45 seconds
The test page consists of a few blocks: a header, a paragraph with 6 words, an icon with weight 22.9 kB and no loops at all
* Trying to change the icon from the Page Edit window took 1 minute 52 seconds for the Media Library to open
* Saving the page took 55 seconds when not timing out - it is usually within a few seconds.
So accessing the Media Library from WP dashboard seems fine, but not when accessing it from within Page Edit.
Running Debug on 9 October (Tuesday) shows 1867 instances relating to PHP Deprecated happened on Monday.
They relate to Types - perhaps post types? (which we created using Toolset).
Quite a few lines mention Toolset.
The Stack trace summary lists all refer to Toolset.
In a previous support request to Toolset the Deprecated message relating to Toolset was mentioned, but you replied that should not be an issue.
At the moment we are stuck and have no idea how to solve this problem - or even it is related to Toolset. It is strange that this only happens in Page edit.
Please help.
Jacques