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### Performance

Performance of Boost.Context was measured on the platforms shown in the following table. Performance measurements were taken using `rdtsc` and `boost::chrono::high_resolution_clock`, with overhead corrections, on x86 platforms. In each case, cache warm-up was accounted for, and the one running thread was pinned to a single CPU. The code was compiled using the build options, 'variant = release cxxflags = -DBOOST_DISABLE_ASSERTS'.

Table 1.1. Performance of context switch

Platform | ucontext_t | fcontext_t | windows fibers
--- | --- | --- | ---
i386 [a] | 708 ns / 754 cycles | 37 ns / 37 cycles | ns / cycles
x86_64 [b] | 547 ns / 1433 cycles | 8 ns / 23 cycles | ns / cycles
[a] AMD Athlon 64 DualCore 4400+ [b] Intel Core2 Q6700