message: Disable PinToHostOptimizer for NoOp.
diff: @@ -169,7 +169,13 @@ bool IsTPUGraphDef(const GraphDef& def) {
  }
  // All the nodes that should be blacklisted and not swapped.
  -bool IsBlacklisted(const NodeDef& node) { return IsCollective(node); }
  +bool IsBlacklisted(const NodeDef& node) {
  + return
  + // Collective ops should not be swapped.
  + IsCollective(node) ||
  + // NoOp breaks perf regression tests (probably due to group dependencies).
  + IsNoOp(node);
  +}
  } // end namespace internal
  Status PinToHostOptimizer::Optimize(Cluster* cluster, const GrapplerItem& item,
  