When should you prefer shared variables with threads::shared, and when should you avoid it?

Using `threads::shared` in Perl can be advantageous in certain situations, particularly when you need to have multiple threads access or modify shared data. However, it can also introduce complexities such as data races and deadlocks, which can make debugging and maintenance more difficult. It is essential to choose wisely when to use shared variables to ensure thread safety and to maintain code clarity and performance.
threads::shared, Perl, shared variables, multithreading, thread safety, data races, performance, programming 

use threads;
use threads::shared;

# Shared variable
my $shared_counter :shared = 0;

# Worker thread
sub worker {
    for (1..100) {
        sleep(0.01); # Simulate work
        # Increment the shared counter
        atomic_increment($shared_counter);
    }
}

# Create threads
my @threads = map { threads->create(\&worker) } 1..10;

# Wait for threads to finish
$_->join() for @threads;

# Output the final count
print "Final count: $shared_counter\n";

threads::shared Perl shared variables multithreading thread safety data races performance programming

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