PatchLog
Fast page insert in wordpress
You want to create a lot of pages in wordpress using a script to populate a blog with content you might have. To make sure your script will be compatible with future versions of wordpress you want to use wp_insert_post
The Problem
The more pages you add the slower your script will be. With about 700 pages my script took 12 seconds to add a new page.
After digging through the code I found out that wp_insert_code calls $wp_rewrite->flush_rules() every time a new post or page is inserted and that this is what takes the most time to finish.
Now it makes sense, the more pages you have the more rules ( permalinks ) you have and more time it will take to finish that function call.
The Solution
The call to $wp_rewrite->flush_rules() can be disabled by defining WP_IMPORTING. Now inserting a post takes just a second or less. But you still have to call $wp_rewrite->flush_rules() after you're done inserting all posts. This call will take quite a lot depending on the total number of posts/pages you have but it's a lot better to call it only once then a few hundreds or thousand times.
The way wordpress updates it's rules needs to change. Even if we can solve the bulk import problem by calling flush_rules at the end , we end up with a blog with thousands of pages where trying to publish a new post manually might take 30 or more seconds.
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