jquery - freeing memory after ajax request -

after ajax requst can free memory doing this?

function ajax(){     this.url = null;     this.data = null;     this.success = null;      this.global = true;     this.timeout = json_timeout;     this.cache = false;     this.datatype = 'json';     this.type = 'post';      var _this = this;      this.send = function(){         var jqxhr = $.ajax({                 url : this.url,                 data : this.data,                 timeout : this.timeout,                 cache : this.cache,                 datatype : this.datatype,                 type : this.type,                 global : this.global                 }             )             .success(this.success)             .error(function(){                 dialog.set_error({                     headline : lang.get('hdl_error'),                     body : lang.get('err_timeout'),                     btns : [                         {                             value : lang.get('btn_ok'),                             script : function(){},                             focus : true                             }                         ]                     })                 })             .complete(function(){                     delete _this;                 });     }; } 

no. delete doesn't release memory, removes properties objects. if call on var (as you've done), has no effect.

javascript garbage-collected language. memory consumed object automatically reclaimed when nothing has reference object anymore. circular references handled automatically (so if a refers b , b refers a, provided nothing else refers a or b, can both reclaimed).

where run issues circular references non-javascript objects, on browsers (i'm looking @ you, microsoft). if have dom element refers object (say, function), , object refers dom element, on ie if nothing else refers either of objects, they'll never reclaimed. wouldn't seem case example.

(re statement delete above: if happens property you're removing object refers object nothing else refers to, removing property makes object available reclaimed. that's side effect, , again, delete relates properties, not variables.)