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Martin Hořeňovský
45f9ea1e79
The goal is to do the equivalent of clobbering memory, which forces
the compiler to keep side effects that are external to the benchmarked
function, while allowing it to optimize inside the benchmarked function.
E.g. this cannot be optimized away:
```cpp
BENCHMARK("foo") {
global_count += 1;
};
```
while this can:
```cpp
BENCHMARK("bar") {
size_t local_count = 0;
for (size_t i = 0; i < 100; ++i) {
local_count += 1;
}
};
```