unity ios armv7 & arm64 build performance diffrence

I have a problem with the arm64 build when building armv7 / arm64 in the same project.

• Project setting

  1. IL2CPP setting

  2. Graphic API settings - Apply all the changes.

  3. NET 2.0 Subset Settings

  4. Strip Engine Code Setting

  5. Fast but no Exceptions setting

  6. Setting 60 FPS

• test & compare (only occurs in arm64)

  1. i found while testing five blocks falling at constant speed

  2. falling block suddenly bounces occurs constantly.

  3. The same thing does not happen in Android builds.

  4. IOS occurs as a whole, but Iphone7s can be clearly seen splashing.

  5. There is no sudden change in the FPS displayed by XCode.

Test version: 5.4.5f1, 5.6.1f1, 5.6.2p3, 2017.1.0f3

profiler ( armv7 build / arm64 build)