Security and Performance Pitfalls in Python, PHP, and JavaScript Projects

Short summary

Python, PHP, and JavaScript projects frequently suffer from interconnected security and performance mistakes that are largely preventable: SQL injection, eval() execution, N+1 queries, unvalidated file uploads, and event loop blocking. Common prevention patterns include input validation at all layers, parameterized queries, query profiling, and routine dependency management. The author uses this to promote a book offering detailed solutions.

• •Security and performance are interconnected; poor practices often trigger both problems simultaneously
• •Common vulnerabilities: SQL injection, eval() execution, N+1 queries, unvalidated file uploads, event loop blocking
• •Prevention requires input validation at all layers, parameterized queries, query profiling, and routine dependency updates

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