Performance

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## Performance

Performance of Boost.Coroutine 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.

Table 1.1. Performance of asymmetric coroutines

Platform | switch | construction (protected stack-allocator) | construction (preallocated stack-allocator) | construction (standard stack-allocator)
--- | --- | --- | --- | ---
i386 (AMD Athlon 64 DualCore 4400+, Linux 32bit) | 49 ns / 50 cycles | 51 µs / 51407 cycles | 14 µs / 15231 cycles | 14 µs / 15216 cycles
x86_64 (Intel Core2 Q6700, Linux 64bit) | 12 ns / 39 cycles | 16 µs / 41802 cycles | 6 µs / 10350 cycles | 6 µs / 18817 cycles

Table 1.2. Performance of symmetric coroutines

Platform | switch | construction (protected stack-allocator) | construction (preallocated stack-allocator) | construction (standard stack-allocator)
--- | --- | --- | --- | ---
i386 (AMD Athlon 64 DualCore 4400+, Linux 32bit) | 47 ns / 49 cycles | 27 µs / 28002 cycles | 98 ns / 116 cycles | 319 ns / 328 cycles
x86_64 (Intel Core2 Q6700, Linux 64bit) | 10 ns / 33 cycles | 10 µs / 22828 cycles | 42 ns / 710 cycles | 135 ns / 362 cycles