Problem/Motivation

Drupal\Core\EventSubscriber\MenuRouterRebuildSubscriber::menuLinksRebuild is the Drupal 8 equivalent of _menu_navigation_links_rebuild()

_menu_navigation_links_rebuild() had several optimizations not to re-save save links that hadn't changed, as well as things like #1010480: Optimize _menu_navigation_links_rebuild().

Proposed resolution

Try to add those back.

Remaining tasks

User interface changes

API changes

CommentFileSizeAuthor
#3 Screen Shot 2015-06-06 at 11.13.18 AM.png110.26 KBcatch
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Comments

catch’s picture

catch
he/him
Primary language English
CreditAttribution: catch commented
Parent issue: » #2470679: [meta] Identify necessary performance optimizations for common profiling scenarios
dawehner’s picture

dawehner
Primary language German
CreditAttribution: dawehner as a volunteer commented

Urgs

catch’s picture

catch
he/him
Primary language English
CreditAttribution: catch commented
Title: Menu link rebuilding no longer optimizes for unchanged menu links » Try to avoid writing to the menu tree if it hasn't changed
Category: Bug report » Task
FileSize
Screen Shot 2015-06-06 at 11.13.18 AM.png110.26 KB

I think I got this wrong, what I was seeing was the re-saving of the menu tree and updating parent status. if we were resaving menu links it'd be much, much worse.

It may be possible to optimize this though by checking for changes before we write.

Attaching xhprof screenshot that shows where the update queries are coming from.

I also noticed this happens within route rebuilding which I'm not sure is strictly necessary/desirable, opened #2501555: Move menu link rebuilding out of route rebuilding.

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