I tried the four variants on my Linux box (uncomment the one you want):
#!/usr/bin/perl
use strict;
use warnings;
my @objs;
for my $i (1 .. 1_000_000) {
# push @objs, { id => $i, name => "Object of class", number => int
+ rand 10 };
# push @objs, bless { id => $i, name => "Object of class", number
+=> int rand 10 }, 'My::Class';
# push @objs, [$i, 'Object of class', int rand 10];
push @objs, bless [$i, 'Object of class', int rand 10], 'My::Class
+';
}
print `ps -v | grep ^$$`;
It seems bless doesn't really change anything, but a hash versus array does.
23235 pts/0 S+ 0:00 0 2020 371111 359628 1.1 /usr/bin/pe
+rl ./1.pl
23225 pts/0 S+ 0:00 0 2020 261035 249668 0.7 /usr/bin/pe
+rl ./1.pl
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]