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    <p>-O3 Dual core Macbook pro 2.4ghz</p> <blockquote> <p>std::max(x1, x2) Time: 4.19488 RMAAx's : 4.19613 if Time: 4.18775 ? Time: 4.18831 </p> <p>std::max(x1, x2) Time: 4.1836 RMAAx's : 4.18274 if Time: 4.18603 ? Time: 4.18857 </p> <p>std::max(x1, x2) Time: 4.18714 RMAAx's : 4.18759 if Time: 4.19752 ? Time: 4.19797 </p> <p>std::max(x1, x2) Time: 4.1926 RMAAx's : 4.19293 if Time: 4.19334 ? Time: 4.19626 </p> <p>std::max(x1, x2) Time: 4.18963 RMAAx's : 4.19628 if Time: 4.19253 ? Time: 4.19107</p> </blockquote> <pre><code>#include &lt;iostream&gt; using namespace std; int main (int argc, char * const argv[]) { uint64_t iterations = 10000000000; float x1 = 3455.232; float x2 = 7456.856; float y = 0; for (int count = 0; count &lt; 5; ++count) { clock_t begin_time = clock(); for (uint64_t ii = 0; ii &lt; iterations; ++ii) { y = std::max(x1, x2); } std::cout &lt;&lt; "std::max(x1, x2) Time: " &lt;&lt; float( clock () - begin_time ) / CLOCKS_PER_SEC &lt;&lt; endl; begin_time = clock(); for (uint64_t ii = 0; ii &lt; iterations; ++ii) { y = x1; if (y &lt; x2) y = x2; } std::cout &lt;&lt; "RMAAx's : " &lt;&lt; float( clock () - begin_time ) / CLOCKS_PER_SEC &lt;&lt; endl; begin_time = clock(); for (uint64_t ii = 0; ii &lt; iterations; ++ii) { if (x1 &gt; x2) y = x1; else y = x2; } std::cout &lt;&lt; "if Time: " &lt;&lt; float( clock () - begin_time ) / CLOCKS_PER_SEC &lt;&lt; endl; begin_time = clock(); for (uint64_t ii = 0; ii &lt; iterations; ++ii) { y = x1 &gt; x2 ? x1 : x2; } std::cout &lt;&lt; "? Time: " &lt;&lt; float( clock () - begin_time ) / CLOCKS_PER_SEC &lt;&lt; endl; } return 0; } </code></pre>
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