Hi trippledubs,
MCE can process a sequence of numbers efficiently. E.g. 1 to MAX_ITEMS. The bounds_only option tells MCE to pass the next starting and ending elements only. Hence boundaries only. IPC occurs once per each chunk_size.
#!/usr/bin/env perl
use strict;
use warnings;
use MCE;
use constant MAX_ITEMS => 200000;
my $n_workers = shift // do {
die "usage: $0 n_workers\n";
};
sub isPrime {
my $num = shift;
return 1 if ($num < 4);
return 0 if ($num %2 == 0);
for (my $i=3; $i <= sqrt($num); $i+=2) {
return 0 if $num % $i == 0;
}
return 1;
}
sub task {
my ( $mce, $seq, $chunk_id ) = @_;
for my $data ( $seq->[0] .. $seq->[1] ) {
print "Prime: $data\n" if isPrime($data);
}
}
MCE->new(
max_workers => $n_workers,
sequence => [ 1, MAX_ITEMS ],
bounds_only => 1,
chunk_size => 200,
user_func => \&task,
)->run();
Regards, Mario
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