Logging In Loop (ARCH4164)

Key java.logging.logging-in-loop · Severity info · Category logging

Logging on every iteration of a loop floods log sinks with thousands of lines on large collections. Performance drops and important messages get lost in the noise.

Incorrect

for (Order order : orders) {
    log.info("Processing: {}", order.id());
    process(order);
}

Correct

for (Order order : orders) {
    process(order);
}
log.info("Processed {} orders", orders.size());

Fix

Move logging out of the loop into a single summary; if per-iteration logging is needed, use the trace/debug level.