The unique ID for the current thread.
identity < 0 represent running in Flutter UI Thread.
identity >= 0 represent running in dedicated thread.
identity with integer part are the same represent they are running in the same thread, for example, 1.1 and 1.2
will the grouped into one thread.
In dedicated thread mode, WebF creates a shared buffer to record the UI operations that are generated from the JS thread.
This approach allows the UI and JavaScript threads to run concurrently as much as possible in most use cases.
Once the recorded commands reach the maximum buffer size, commands will be packaged by the JS thread and sent to
the UI thread to be executed and apply visual UI changes.
Setting this value to 0 in dedicated thread mode can achieve 100% concurrency but may reduce page speed because the
generated UI commands will be executed on the UI thread immediately while the JS thread is still running.
However, this concurrency sometimes leads to inconsistent UI rendering results,
so it's advisable to adjust this value based on specific use cases.
