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.