Performed full review of 5073274...47ee72c

Analysis

1. Security Vulnerability: The unauthenticated /internal/benchmark endpoint could enable DoS attacks, and benchmark stats file uses world-readable permissions (0644), potentially exposing sensitive system data.

2. Resource Leaks: Background goroutines lack cancellation mechanisms and run continuously without shutdown capability, leading to goroutine leaks and unnecessary resource consumption.

3. Performance Inefficiencies: Implementation uses O(n²) bubble sort instead of stdlib's O(n log n) sort for percentiles, and blocking 100ms sleep during CPU measurement may interfere with collection accuracy.

4. Data Corruption Risk: No atomic write pattern for benchmark files could lead to corrupted data during process crashes, and silent error handling in CPU stats parsing may produce incorrect metrics without indication.

5. Monitoring Gaps: Missing error logging when parsing /proc files fails, reducing observability and making troubleshooting difficult.

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