Why iOS ARM64 CPU Opt level 0 is faster than Opt level 3?

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Hi @alopez_13 thank you for your response below are the target details.

For iOS CPU.

  • sdk = “iphoneos”
  • target = “llvm -mtriple=arm64-apple-darwin”

For iOS Metal:

  • sdk = “iphoneos”
  • target = “metal”
  • target_host = “llvm -mtriple=arm64-apple-darwin”

and this model is float32 NHWC