Reduce time required to run bench_quickopen
By doing more :) QTestLib otherwise detecs that the time required for a single loop is too fast, it then retries with a higher iteration count but that requires running the setup code again. And that is actually way slower than the stuff we want to benchmark here... So increase the workload of the benchmark code, or altneratively use QBENCHMARK_ONCE with a large inner loop count. Previously, the whole benchmark took ~25s on my system. Now it only takes ~7s and gives better data too.
Showing with 29 additions and 17 deletions