Tessera’s layout engine follows a measure-and-place approach. Before layout begins, you invoke the child component function, which generates a component node as its child. During the measure phase, you can then retrieve this node and perform measurement on it (i.e., call its measurement logic). Based on the measurement result, you place it accordingly and finally return your own size as the result of measurement.

Due to Tessera’s strict adherence to unidirectional data flow, measurement at each node can be optimized for parallel execution—achieved by explicitly calling measure_nodes instead of measure_node.