How does unity fixedupdate call at a fixed frame rate

Think about a problem

• fixedupdate Fixed frame rate execution , Is it possible that nothing in the method will get stuck , How can you be so awesome

survey

• So I wrote a demo, stay fixedupdate Inside loop 10 Ten thousand times , do pow operation
• Find out
  • Update and LateUpdate Frame rate decreased
  • Fixed Frame rate is still achieved Unity default 50 frame

Conclusion

• unity perform FixedUpdate If the frame rate is not reached, this function will be executed several times until the target frame rate is reached
• This is at the expense of rendering frame rate