[Bug Report] time consumption spends from 20ms to 60ms in arm android device after apply this commit

When I run my own tvm model in arm android device, I found the time consumption spends from 20ms to 60ms, after apply this commit = 944d8d13746e0b287780064ced0f1e50bc26208a. I m not quite familiar with the thread, so I m asking for official help

  • to explain what does the commit is used for
  • why the speed in arm android device dropped so much? @tqchen @masahi

Why the sanity test did not expose the important bug after 3 months till now?