hypercubestart commented on a change in pull request #5812:
URL: https://github.com/apache/incubator-tvm/pull/5812#discussion_r491477842



##########
File path: src/driver/driver_api.cc
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@@ -225,6 +226,7 @@ std::pair<IRModule, IRModule> SplitDevHostFuncs(IRModule 
mod_mixed, const Target
       BindTarget(target),
       tir::transform::LowerWarpMemory(),
       tir::transform::Simplify(),
+      tir::transform::LowerCustomDatatypes(),

Review comment:
       hi @zhiics thank you for the comment. Here is the data I data gathered 
using the script you linked, running purely on graph runtime:
   
   |                         | Master          | CustomDatatypes |
   |-------------------------|-----------------|-----------------|
   | Resnet18 (cpu, gpu)     | 22.19ms, 0.98ms | 21.57ms, 0.98ms |
   | Resnet50 (cpu, gpu)     | 49.92ms, 2.86ms | 52.53ms, 2.87ms |
   | Mobilenet (cpu, gpu)    | 8.30ms, 0.70ms  | 8.50ms, 0.70ms  |
   | Inception_v3 (cpu, gpu) | 70.50ms, 6.18ms | 69.97ms, 6.18ms |
   
   so there is no perf impact on the current numbers




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