function enableDebugMode() {
	  env().set('DEBUG', true);
	}
Enables debug mode which will log information about all executed kernels:
the elapsed time of the kernel execution, as well as the rank, shape, and
size of the output tensor.

Debug mode will significantly slow down your application as it will
download the result of every operation to the CPU. This should not be used in
production. Debug mode does not affect the timing information of the kernel
execution as we do not measure download time in the kernel execution time.

See also: `tf.profile`, `tf.memory`.

@doc {heading: 'Environment'}