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// Copyright 2014 Google Inc. All Rights Reserved.
//
// 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.
// Tests manifest parser performance. Expects to be run in ninja's root
// directory.
#include <numeric>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif
#include "disk_interface.h"
#include "manifest_parser.h"
#include "metrics.h"
#include "state.h"
#include "util.h"
struct RealFileReader : public ManifestParser::FileReader {
virtual bool ReadFile(const string& path, string* content, string* err) {
return ::ReadFile(path, content, err) == 0;
}
};
bool WriteFakeManifests(const string& dir) {
RealDiskInterface disk_interface;
if (disk_interface.Stat(dir + "/build.ninja") > 0)
return true;
printf("Creating manifest data..."); fflush(stdout);
int err = system(("python misc/write_fake_manifests.py " + dir).c_str());
printf("done.\n");
return err == 0;
}
int main() {
const char kManifestDir[] = "build/manifest_perftest";
RealFileReader file_reader;
vector<int> times;
string err;
if (!WriteFakeManifests(kManifestDir)) {
fprintf(stderr, "Failed to write test data\n");
return 1;
}
chdir(kManifestDir);
const int kNumRepetitions = 5;
for (int i = 0; i < kNumRepetitions; ++i) {
int64_t start = GetTimeMillis();
State state;
ManifestParser parser(&state, &file_reader);
if (!parser.Load("build.ninja", &err)) {
fprintf(stderr, "Failed to read test data: %s\n", err.c_str());
return 1;
}
int delta = (int)(GetTimeMillis() - start);
printf("%dms\n", delta);
times.push_back(delta);
}
int min = *min_element(times.begin(), times.end());
int max = *max_element(times.begin(), times.end());
float total = accumulate(times.begin(), times.end(), 0);
printf("min %dms max %dms avg %.1fms\n", min, max, total / times.size());
}
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