# [Tcl], 77 bytes

    set j -1
    time {set i -2
    time {puts [expr [incr i]|$j?"$i $j":""]} 3
    incr j} 3

[Try it online!][TIO-jh6qgqtx]

[Tcl]: http://tcl.tk/
[TIO-jh6qgqtx]: https://tio.run/##K0nO@f@/OLVEIUtB15CrJDM3VaEaxM1U0DWCcgtKS4oVolMrCooUojPzkosUMmNrVLLslVQyFVSylKyUlGJrFYy5wDJZQNb//wA "Tcl – Try It Online"