Are there guidelines which tool (e.g. insert into array vs build array) is more efficient, so code can be done in less time?

Me and my colleague played around with some code yesterday. We took a file with 20k datapoints and turned them into some arrays to interprete them and show them in some waveforms and the like. In the process of trying to get it work a bit faster we played around with some things, and when we exchanged the "build array" function with the "insert into array" in a loop with a shift register, our process time fell from 10 seconds to basically 1 second!

So that got us thinking, are there any guidelines somewhere to which tools in Labview are the most time efficient?

Thank you for your input ^^