Speed up my code

[DiDi]

I have an imaginary code - 
First question :
I have to get just "bid" and "ask" value for each tick, it's faster with the "MqlTick" structure, or "SymbolInfoDouble" ? 
Second question :
I have (for example) 3 indicator : a moving average "MA" - an average true range "ATR" - an average directional movement index "ADX", it's faster to use the handle "iMA" -"iATR" - "iADX", or write their codes to my program [it's possible to write their code in just one program?] ?
Third question :
I have 1 or more custom indicators : it's faster to use the handle "iCustom", or write their codes to my program?

I hope you can understand what I mean. I'm not so good with english.

Thanks whoever aswer in advise.  

[Mohamad Zulhairi Baba]

DiDi:
I have an imaginary code - 
First question :
I have to get just "bid" and "ask" value for each tick, it's faster with the "MqlTick" structure, or "SymbolInfoDouble" ? 
Second question :
I have (for example) 3 indicator : a moving average "MA" - an average true range "ATR" - an average directional movement index "ADX", it's faster to use the handle "iMA" -"iATR" - "iADX", or write their codes to my program [it's possible to write their code in just one program?] ?
Third question :
I have 1 or more custom indicators : it's faster to use the handle "iCustom", or write their codes to my program?

I hope you can understand what I mean. I'm not so good with english.

Thanks whoever aswer in advise.  

Faster than what?? speed of light?

1. https://docs.mql4.com/predefined // Predefined variable 
2. https://docs.mql4.com/indicators // Pre programmed custom indicator
3. Depend, if you have the mql file for custom indicator, and it's favorable to transfer into your program.
   otherwise if you don't, just use iCustom.