ReadonlybuildMilliseconds from the submit to the stats on the CPU (the build plus the readback's latency).
ReadonlybuiltReadonlyfailureWhy the whole batch failed (it couldn't start, or its readback failed), or null. Its meshes are then all in refused.
Optional ReadonlygpuGPU milliseconds of the batch's compute pass, from timestamps (timestamps: true on a device with timestamp-query), else null or absent.
Readonlyrefused
What one batch gave, once its stats were read back.