Opened 8 months ago

Closed 2 months ago

Last modified 2 months ago

#15082 closed bug (fixed)

jQuery Autocomplete Duplicate Remove event listener

Reported by: jGeek314 Owned by: Scott González
Priority: minor Milestone: 1.12.2
Component: ui.autocomplete Version: 1.12.1
Keywords: Cc:
Blocked by: Blocking:

Description

While trying to determine what was slowing down my autocomplete text box, I noticed that every time the user types in the target text box the number of event listeners would go up. It looks like autocomplete (or the widget factory?) is adding duplicate "remove" events to the target. This can be reproduced by adding the following line to the default autocomplete example at https://jqueryui.com/autocomplete/ .

response: function (e, ui) {
        console.log( jQuery._data( $("#tags")[0], "events" ) );
      }

When looking at the results in chrome's developer tools I can see the number of event listeners go up every time the the user types in the target text box.

Object {remove: Array[3], keydown: Array[1], keypress: Array[1], input: Array[1]...
Object {remove: Array[5], keydown: Array[1], keypress: Array[1], input: Array[1]...
Object {remove: Array[7], keydown: Array[1], keypress: Array[1], input: Array[1]...
Object {remove: Array[9], keydown: Array[1], keypress: Array[1], input: Array[1]...

http://plnkr.co/edit/Jk2xg3ZjJ5jS5mgP1zHZ?p=preview is a demo of the remove events growing.

Change History (4)

comment:1 Changed 8 months ago by vladimir-i

I have also encountered a significant slowdown of autocomplete after upgrading from 1.11 to 1.12. It gets worse the more you use it, eventually slowing to a crawl.

Here's a demo: https://jsfiddle.net/Lm7xqs37/1/
It's a copy of the default example but with more autocomplete options and with delay set to 0 to make it easier to see the slowdown.
To reproduce: enter and delete a letter (e.g. 's') a number of times and see how it gets slower and slower.

Chrome CPU profiler result:

5725.9 ms88.63 %	6109.0 ms94.56 %	hasDuplicate	jquery-1.12.4.js:1340	
5724.9 ms88.62 %	6109.0 ms94.56 %	Sizzle.uniqueSort	jquery-1.12.4.js:1509	
5724.1 ms88.61 %	6108.2 ms94.55 %	add	jquery-1.12.4.js:3063	
5724.1 ms88.61 %	6108.2 ms94.55 %	_on	jquery-ui.js:573	
5724.1 ms88.61 %	6108.2 ms94.55 %	_classes	jquery-ui.js:503	
5724.1 ms88.61 %	6108.2 ms94.55 %	_toggleClass	jquery-ui.js:560	
3930.8 ms60.85 %	4198.2 ms64.99 %	_addClass	jquery-ui.js:556	
3930.8 ms60.85 %	4198.1 ms64.98 %	refresh	jquery-ui.js:5195	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	_suggest	jquery-ui.js:6092	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	__response	jquery-ui.js:6033	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	_superApply	jquery-ui.js:132	
3930.8 ms60.85 %	4198.1 ms64.98 %	__response	jquery-ui.js:6223	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:6021	
3930.8 ms60.85 %	4198.1 ms64.98 %	proxy	jquery-1.12.4.js:528	
3930.8 ms60.85 %	4198.1 ms64.98 %	source	jquery-ui.js:5951	
3930.8 ms60.85 %	4198.1 ms64.98 %	_search	jquery-ui.js:6010	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	search	jquery-ui.js:5993	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:136	
3930.8 ms60.85 %	4198.1 ms64.98 %	(anonymous function)	jquery-ui.js:5979	
3930.8 ms60.85 %	4198.1 ms64.98 %	handlerProxy)	query-ui.js:639

Chrome heap profiler shows that every time autocomplete search happens the old results div and li elements become a detached dom tree that can't get garbage collected.

comment:2 Changed 8 months ago by vladimir-i

Thanks to jGeek314 for the workaround in 10050, it works great:

search: function(e,ui){
     //fix bug in jQuery.ui somewhere where menu.bindings just grows and grows
     autoComplete.data("ui-autocomplete").menu.bindings = $();
},

comment:3 Changed 2 months ago by Scott González

Owner: set to Scott González
Resolution: fixed
Status: newclosed

In ef2e9ba:

Widget: Improve remove event bindings for classes options

Fixes #15078
Fixes #15082
Fixes #15095
Fixes #15136
Fixes #15152
Closes gh-1769

comment:4 Changed 2 months ago by Scott González

Milestone: none1.12.2
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