Date: Tue, 27 Jan 2004 21:18:26 -0500 From: slave-mike <slave-mike@slavepix.com> To: "'freebsd-current@freebsd.org'" <freebsd-current@freebsd.org> Subject: 5.x SLOW - How do I speed it up? Message-ID: <40171BF2.8090903@slavepix.com>
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What are all the options one needs to change before doing a buildworld/installworld to make sure all the debugging features are off? > NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW: > FreeBSD 5.x has many debugging features turned on, in > both the kernel and userland. These features attempt to detect > incorrect use of system primitives, and encourage loud failure > through extra sanity checking and fail stop semantics. They > also substantially impact system performance. If you want to > do performance measurement, benchmarking, and optimization, > you'll want to turn them off. This includes various WITNESS- > related kernel options, INVARIANTS, malloc debugging flags > in userland, and various verbose features in the kernel. Many > developers choose to disable these features on build machines > to maximize performance.
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