$ perl demo2.pl 
Parent 1
Inside child #1 1646276375.98194
Inside child #2 1646276376.18194
Inside child #1 1646276376.38187
Inside child #2 1646276376.58187
Inside child #1 1646276376.78162
Parent 2
Inside child #2 1646276376.98187
Inside child #1 1646276377.18188
Inside child #2 1646276377.38187
Inside child #1 1646276377.58188
Inside child #2 1646276377.78186
Parent 3
Inside child #1 1646276377.98187
Inside child #2 1646276378.18187
Inside child #1 1646276378.38187
Inside child #2 1646276378.58187
Inside child #1 1646276378.78187
Parent 4
Inside child #2 1646276378.98187
Inside child #1 1646276379.18188
Inside child #2 1646276379.38187
Inside child #1 1646276379.58187
Inside child #2 1646276379.78187
Parent 5
Inside child #1 1646276379.98187
Inside child #2 1646276380.18187
Inside child #1 1646276380.38188
Inside child #2 1646276380.58187
Inside child #1 1646276380.78187