Learn PERL with Real Code Examples

Interpreter overhead may impact CPU-heavy tasks

Regular expressions are highly optimized

Avoid unnecessary global variables for memory efficiency

Lazy file reading helps large dataset processing

Compiled XS modules improve performance-critical tasks

Sanitize user input for CGI scripts

Avoid eval on untrusted input

Use `taint` mode (`perl -T`) for safe scripting

Limit file system and network access

Keep Perl and CPAN modules up to date

Log script performance

Trace errors via STDERR

Monitor network or file operations

Benchmark regex or critical loops

Ensure modular components are tested

Use `strict` and `warnings` pragmas

Document subroutines and modules

Write unit tests with Test::More

Maintain readability and avoid dense one-liners

Leverage CPAN for tested solutions