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// Copyright 2009-present MongoDB, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "score_recorder.hpp"
#include <algorithm>
#include <stdexcept>
namespace benchmark {
score_recorder::score_recorder(double task_size)
: _execution_time{0}, _sorted{false}, _task_size{task_size} {}
const std::chrono::milliseconds& score_recorder::get_execution_time() const {
return _execution_time;
}
void benchmark::score_recorder::start_sample() {
_last_start = std::chrono::high_resolution_clock::now();
}
void score_recorder::end_sample() {
std::chrono::time_point<std::chrono::high_resolution_clock> end =
std::chrono::high_resolution_clock::now();
std::chrono::milliseconds duration =
std::chrono::duration_cast<std::chrono::milliseconds>(end - _last_start);
_samples.push_back(duration);
_sorted = false;
_execution_time += duration;
}
const std::chrono::milliseconds& score_recorder::get_percentile(unsigned long n) {
if (_samples.empty()) {
throw std::runtime_error("No samples recorded yet");
}
if (!_sorted) {
std::sort(_samples.begin(), _samples.end());
_sorted = true;
}
if (_samples.size() == 1) {
return _samples[0];
}
return _samples[(_samples.size() * n / 100) - 1];
}
double score_recorder::get_score() {
return _task_size / (static_cast<double>(get_percentile(50).count()) * .001);
}
} // namespace benchmark
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