Issues parsing a 1GB json file using JSON.NET
json,parsing,stream,json.net,large-object-heap
Thanks for all the help, I've managed to get it doing what I want which is de-serializing individual location objects. If the item is converted to a JObject it will read in the full object and de-serialize it, this can be looped to get the solution. This is the code...
Extensive use of LOH causes significant performance issue
c#,performance,garbage-collection,large-object-heap
The performance problems usually come from two areas: allocation and fragmentation. Allocation The runtime guarantees clean memory so spends cycles cleaning it. When you allocate a large object, that's a lot of memory and starts to add milliseconds to a single allocation (when lets be honest, simple allocation in .NET...
Get list of object instances that are in LOH
.net,windbg,sos,large-object-heap,sosex
To get all objects on LOH you can use SOS !dumpheap with the -min option. !dumpheap -min 85001 To limit the output to the type of objects you're looking for, first determine the method table (MT) of your object by doing a !dumpheap -type <MyClass> Address MT Size 03653250 785037b8...
Objects added to the Large Object Heap
You are right that if array is larger than 85000 then it will be consider as LOH not entire object. To explain this here I created example. class Program { static void Main(string[] args) { Obj o = new Obj(); o.Allocate(85000); Console.WriteLine(System.GC.GetGeneration(o)); Console.WriteLine(System.GC.GetGeneration(o.items)); Console.WriteLine(System.GC.GetGeneration(o.items2)); Console.WriteLine(System.GC.GetGeneration(o.Data)); Console.ReadLine(); } class Obj {...