| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include"base/rand_util.h" |
| |
| #include"base/time/time.h" |
| #include"testing/gtest/include/gtest/gtest.h" |
| #include"testing/perf/perf_result_reporter.h" |
| |
| namespace base{ |
| |
| namespace{ |
| |
| constexprchar kMetricPrefix[]="RandUtil."; |
| constexprchar kThroughput[]="throughput"; |
| |
| }// namespace |
| |
| TEST(RandUtilPerfTest,RandUint64){ |
| uint64_t inclusive_or=0; |
| constexprint kIterations=1e7; |
| |
| auto before= base::TimeTicks::Now(); |
| for(int iter=0; iter< kIterations; iter++){ |
| inclusive_or|= base::RandUint64(); |
| } |
| auto after= base::TimeTicks::Now(); |
| |
| perf_test::PerfResultReporter reporter(kMetricPrefix,"RandUint64"); |
| reporter.RegisterImportantMetric(kThroughput,"ns / iteration"); |
| |
| uint64_t nanos_per_iteration=(after- before).InNanoseconds()/ kIterations; |
| reporter.AddResult("throughput",static_cast<size_t>(nanos_per_iteration)); |
| ASSERT_NE(inclusive_or,static_cast<uint64_t>(0)); |
| } |
| |
| TEST(RandUtilPerfTest,InsecureRandomRandUint64){ |
| base::InsecureRandomGenerator gen; |
| |
| uint64_t inclusive_or=0; |
| constexprint kIterations=1e7; |
| |
| auto before= base::TimeTicks::Now(); |
| for(int iter=0; iter< kIterations; iter++){ |
| inclusive_or|= gen.RandUint64(); |
| } |
| auto after= base::TimeTicks::Now(); |
| |
| perf_test::PerfResultReporter reporter(kMetricPrefix, |
| "InsecureRandomRandUint64"); |
| reporter.RegisterImportantMetric(kThroughput,"ns / iteration"); |
| |
| uint64_t nanos_per_iteration=(after- before).InNanoseconds()/ kIterations; |
| reporter.AddResult("throughput",static_cast<size_t>(nanos_per_iteration)); |
| ASSERT_NE(inclusive_or,static_cast<uint64_t>(0)); |
| } |
| |
| }// namespace base |
