In Unity, the first call to MessagePackSerializer.SerializeToJson is very slow. #2239
Description
Bug description
In Unity, the first call to MessagePackSerializer.SerializeToJson is very slow, taking more than 500ms. I’m not sure whether this is a bug or expected behavior.
Repro steps
[MessagePackObject]
public class TestData {
[Key(1)] public int TypeId;
}
private void Test() {
var data = new TestData();
var sw = new Stopwatch();
sw.Start();
MessagePackSerializer.SerializeToJson(data);
sw.Stop();
Debug.LogFormat("First MessagePackSerializer.SerializeToJson took {0} ms", sw.ElapsedMilliseconds);
sw.Restart();
MessagePackSerializer.SerializeToJson(data);
sw.Stop();
Debug.LogFormat("Second MessagePackSerializer.SerializeToJson took {0} ms", sw.ElapsedMilliseconds);
}
log:
First MessagePackSerializer.SerializeToJson took 559 ms
Second MessagePackSerializer.SerializeToJson took 0 ms
Expected behavior
The first call to MessagePackSerializer.SerializeToJson won't be so slow
Actual behavior
The first call to MessagePackSerializer.SerializeToJson is very slow, taking more than 500ms.
- Version used: 3.1.4
- Runtime: (Unity, mono, etc.)