The idea [of an object cache] is to preserve the invariant … not have to be destroyed and recreated every … mutex_init() applied once -- the first time the … An object's embedded locks, condition variables, reference counts, … [p. 90] it reduces the instruction-cache footprint of the … [p. 94] [For frequently allocated objects in the SunOS 5.4 kernel, object caching is 1.3x to 5.1x faster].
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