Improve performance of searching JSON object with jQuery
- by cale_b
Please forgive me if this is answered on SO somewhere already. I've searched, and it seems as though this is a fairly specific case.
Here's an example of the JSON (NOTE: this is very stripped down - this is dynamically loaded, and currently there are 126 records):
var layout = {
"2":[{"id":"40","attribute_id":"2","option_id":null,"design_attribute_id":"4","design_option_id":"131","width":"10","height":"10",
"repeat":"0","top":"0","left":"0","bottom":"0","right":"0","use_right":"0","use_bottom":"0","apply_to_options":"0"},
{"id":"41","attribute_id":"2","option_id":"115","design_attribute_id":"4","design_option_id":"131","width":"2","height":"1",
"repeat":"0","top":"0","left":"0","bottom":"4","right":"2","use_right":"0","use_bottom":"0","apply_to_options":"0"},
{"id":"44","attribute_id":"2","option_id":"118","design_attribute_id":"4","design_option_id":"131","width":"10","height":"10",
"repeat":"0","top":"0","left":"0","bottom":"0","right":"0","use_right":"0","use_bottom":"0","apply_to_options":"0"}],
"5":[{"id":"326","attribute_id":"5","option_id":null,"design_attribute_id":"4","design_option_id":"154","width":"5","height":"5",
"repeat":"0","top":"0","left":"0","bottom":"0","right":"0","use_right":"0","use_bottom":"0","apply_to_options":"0"}]
};
I need to match the right combination of values. Here's the function I currently use:
function drawOption(attid, optid) {
var attlayout = layout[attid];
$.each(attlayout, function(k, v) {
// d_opt_id and d_opt_id are global scoped variable set elsewhere
if (v.design_attribute_id == d_att_id
&& v.design_option_id == d_opt_id
&& v.attribute_id == attid
&& ((v.apply_to_options == 1 || (v.option_id === optid)))) {
// Do stuff here
}
});
}
The issue is that I might iterate through 10-15 layouts (unique attid's), and any given layout (attid) might have as many as 50 possibilities, which means that this loop is being run A LOT.
Given the multiple criteria that have to be matched, would an AJAX call work better? (This JSON is dynamically created via PHP, so I could craft a PHP function that could possibly do this more efficently),
or am I completely missing something about how to find items in a JSON object?
As always, any suggestions for improving the code are welcome!
EDIT:
I apologize for not making this clear, but the purpose of this question is to find a way to improve the performance. The page has a lot of javascript, and this is a location where I know that performance is lower than it could be.
