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