How to Perform Basic Performance and Security Checks Without Writing Code

Many people assume that performance and security testing require sophisticated tools like JMeter or specialized scanners, but even testers without coding skills can perform useful preliminary checks.

Performance: act as the user’s “concerned friend” – focus on the feeling of slowness rather than metrics such as QPS or TPS. If a page takes more than 3‑5 seconds to load, use a phone stopwatch to record the time and note it in a bug report (e.g., “page loads in ~8 seconds, user experience is poor”). Open the browser’s Network tab to capture any unusually slow requests. Simulate “multiple users” by opening two browsers or two tabs with different accounts and performing concurrent actions like editing the same article or grabbing a coupon, which can reveal simple concurrency conflicts.

Check front‑end performance by repeatedly scrolling a long list to see if the UI becomes sluggish (possible memory leak) and by switching tabs to verify consistent response times.

Security: become a “good‑hearted hacker” – start with the most common vulnerabilities. Test for privilege escalation by changing a URL parameter such as user_id=123 to 124 and observing whether the system returns an error or displays another user’s data. Verify that ordinary users cannot access admin‑only pages.

Perform input validation checks by entering special characters, HTML snippets, or scripts into any input field; if the page’s layout breaks or an alert appears, it may be vulnerable to XSS. Try extremely long inputs (e.g., hundreds of ‘a’ characters in a phone‑number field) to see if the system truncates, errors out, or crashes.

Inspect for sensitive data leaks by opening the browser’s developer tools, navigating to the Network panel, and looking for plain‑text passwords, ID numbers, or other confidential information in requests or responses. Search the page source for keywords like “password” or “idcard”.

Test simple logic flaws by bypassing front‑end validation: intercept a password‑change request with a tool such as Fiddler or Burp Suite, modify the “confirm password” field to a different value, and resend; acceptance indicates missing back‑end validation. Check captcha robustness by seeing if the same code (e.g., 1234) works repeatedly.

Summary

Use the most basic sense of speed to detect performance problems.

Adopt a “question everything” mindset to probe security.

Make privilege‑escalation tests a mandatory checklist.

Although the issues found may be shallow, they often expose serious underlying defects, providing valuable clues for professional security and performance teams and strengthening overall product quality.