Code reviewMediumcr-g276

Subject Integer overflowLevel Mid–Senior~16 minCommon in Code quality & review interviewsIndustries Software development

Question

Review this Java code that sums request durations (milliseconds) to compute total processing time over a day.

A busy shard handles tens of millions of requests per day.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

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Code to reviewjava

1long totalProcessingSeconds(List<Request> requestsToday) {2    int totalMs = 0;3    for (Request r : requestsToday) {4        totalMs += r.durationMs();   // durationMs(): int, 0..~300005    }6    long totalSeconds = totalMs / 1000L;7    metrics.gauge("processing.total_seconds", totalSeconds);8    return totalSeconds;9}

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