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Reduce the congestion control increment cap back to 50. 50 seems to be good
enough for host discovery, and 100 doesn't give much benefit because the probe timeouts increase to slow the scan down. While it's faster in some cases, it also increases the variance in scan times. For more analysis see http://www.bamsoftware.com/wiki/Nmap/PerformanceGraphs#timeouts.
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@@ -1257,7 +1257,7 @@ static void init_perf_values(struct ultra_scan_performance_vars *perf) {
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perf->cc_incr = 1;
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else
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perf->cc_incr = 2;
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perf->cc_scale_max = 100;
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perf->cc_scale_max = 50;
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perf->initial_ccthresh = 75;
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perf->ping_magnifier = 3;
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perf->pingtime = 5000000;
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