Theano/Theano — pull request #173 by jaberg (2011-10-30 04:52:41+00:00)
Title: add_tag_trace_on_call speeds up optimization

Adding tag traces is expensive. This PR disables adding tag traces during the
optimization process itself, which is anyway not the point of tag traces. This
saves 10 seconds of compilation on a graph I'm working with that ends up with
about 240 nodes, which is about a third of the overall compilation time.