Which driver having lower execution time HAL or LL?

[parth kothiya]

Which driver is faster from HAL or LL so cpu can perform other important tasks.

For example to read & write gpio

​Using HAL driver,

Using LL driver,

Using direct access MCU resistor.​

[TDK · Accepted solution]

Direct register access will always be the fastest.

[S.Ma]

You just described the list in increasing achievable performance level. Apart from this, maybe not all the code requires to be best performance...

[parth kothiya]

Can we use both drivers in same application code writing using HAL + LL + Direct access MCU resistor all of this?​

[TDK]

Yes. A little silly to do so, however. Need to ensure the HAL state machine doesn’t get disturbed but your other code.