Tcl, 39 bytes

time {puts [string repe * [incr i]]} $n 

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while {[incr i]<=$n} {puts [string repe * $i]} 

Tcl, 27 bytes

time {puts [append s *]} $n 

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time {puts [string repe * [incr i]]} $n 

while {[incr i]<=$n} {puts [string repe * $i]} 

#tcl, 39

time {puts [string repe * [incr i]]} $n 

#demo

while {[incr i]<=$n} {puts [string repe * $i]} 

Tcl, 39 bytes

time {puts [string repe * [incr i]]} $n 

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while {[incr i]<=$n} {puts [string repe * $i]} 

#tcl, 46

while {[incr i]<=$n} {puts [string repe * $i]} 

#demo

#tcl, 39

time {puts [string repe * [incr i]]} $n 

#demo

while {[incr i]<=$n} {puts [string repe * $i]}