I have an exposed auto-complete taxonomy filter, It takes time(2sec) to load the values. How to increase the performance to load the values quickly and I'm using views 2.x.


1 Answer 1


Assuming a Drupal installation configured for a production environment (including Apache and MySQL tuning), there are two things that impact autocomplete latency.

One, is a built-in delay between user input and running searches. This is baked into misc/autocomplete.js. The value is set to 300ms (line 245), and get used in Drupal.ACDB.prototype.search (line 287).

The second is that searches will run on a single character. If your autocomplete result set is large, this can have huge performance impacts.

Unfortunately, there isn't a good way to alter either of these behaviors. You can add your own Javascript and redeclare Drupal.ACDB to use a shorter delay, eg

Drupal.ACDB = function (uri) {
  this.uri = uri;
  this.delay = 100;
  this.cache = {};

and Drupal.ACDB.prototype.search to add in some logic to enforce a minimum number of characters, eg

// See if this string needs to be searched for anyway.
searchString = searchString.replace(/^\s+|\s+$/, '');
if (searchString.length <= min ||
  searchString.charAt(searchString.length - 1) == ',') {

However, 400 results isn't a huge number. I have mainly seen the delays this with 10000+ results. This suggests that you may need to do some additional profiling on your server.

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