I have to delete more the 1000 Items (Nodes without children). I have tried to do it with

for (int i = 0; i < items.Count; i++)
{
    UmbracoApplicationContext.Services.ContentService.Delete(items[i]);
}

I have tried also to delete all content of specified ContentType

UmbracoApplicationContext.Services.ContentService.DeleteContentOfType(1234)

Both methods are realy slow.

First method (foreach) do a Job for 100 Items in 47sec, next round takes a 59sec, next round takes 190sec. After fifth round you don't want to wait that the operation finish.

Second method have the same problem, after some time it takes more than 10sec to delete an Item.

Is there some better method doing it? I have also tried BulkManager, and this tool have the same problem. ExecutionTimeout is set inside web.config. Application is build with "release" configurations.