November 2018
Intermediate to advanced
322 pages
7h 54m
English
Content preview from TensorFlow Machine Learning Projects
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The order of execution and lazy loading
The nodes in a computation graph are executed in their order of dependency. If node x depends on node y, then x is executed before y when the execution of y is requested. A node is only executed if either the node itself or another node depending on it is invoked for execution. This execution philosophy is known as lazy loading. As the name implies, the node objects are not instantiated and initialized until they are actually required.
Often, it is necessary to control the order of the execution of the nodes in a computation graph. This can be done with the tf.Graph.control_dependencies() function. For example, if the graph has the nodes l, m, n, and o, and we want to execute n and o before l and
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