Dart HttpRequest polling - dart

Question

I have a web app that have a Timer that fires a poll to get data every 3 seconds. It works fine for about 2.5 minutes then Chromium crashes.
My request Dart looks like this
HttpRequest.getString('data/get_load_history_recent.json')
.then((e) => _recentHistoryResponse(e))
.catchError((e) => _recentHistoryError(e));
Can you think of any reasons why this would happen? I assume it's a memory leak...
Edit:
Here is my _recentHistoryResponse()
void _recentHistoryResponse(String data)
{
Map obj = JSON.decode(data);
if(obj['status'] == 'success')
{
List processes = obj['data']['processes'];
List newItems = new List();
List oldIdsArray = new List();
int length = appDataDic.load_history_list.length;
for(HistoryDataVO oldVO in appDataDic.load_history_list)
{
oldIdsArray.add(oldVO.loadID);
}
for(Map process in processes)
{
HistoryDataVO dataVO = new HistoryDataVO();
dataVO.loadID = process['loadID'];
dataVO.time = process['time'];
dataVO.loadType = process['loadType'];
dataVO.fileName = process['fileName'];
dataVO.label = process['label'];
dataVO.description = process['description'];
dataVO.count = process['count'];
dataVO.progress = process['progress'];
dataVO.loadTask = process['loadTask'];
// Check if the item is currently in the list
if(length >= 1)
{
if(!LoadHistoryHelper.exists(oldIdsArray, dataVO.loadID))
{
dataVO.isNew = true;
}
}
newItems.add(dataVO);
}
appDataDic.load_history_list.clear();
appDataDic.load_history_list.addAll(newItems);
}
}
I have commented out the exists check !LoadHistoryHelper.exists(oldIdsArray, dataVO.loadID)) (because this seemed like the obvious place) but it the VM still crashes.
Also, I have taken this same code and put it into an isolated app with the only real difference in the poll check is appDataDic.load_history_list is just an #observable List, not an ObservableList.
Edit 2 :
Ok, so I have discovered that Map obj = JSON.decode(data); causes the crash. I was reading in a Javascript forum that timeouts cause the memory to not be released (I had never thought of this but it makes sense), is this true? Can any one think of a better way to do this? Can I directly call the garbage collection? I'm running out of ideas.

Answer 1

There's another question here, suggesting a memory leak in HttpRequest; however I'm not able to find anything in the Dart issue tracker. If you think this might be a real memory leak, it might be worth raising a bug.