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-rw-r--r--src/depfile_parser_perftest.cc77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/depfile_parser_perftest.cc b/src/depfile_parser_perftest.cc
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+++ b/src/depfile_parser_perftest.cc
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+// Copyright 2011 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.
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "depfile_parser.h"
+#include "util.h"
+#include "metrics.h"
+
+int main(int argc, char* argv[]) {
+ if (argc < 2) {
+ printf("usage: %s <file1> <file2...>\n", argv[0]);
+ return 1;
+ }
+
+ vector<float> times;
+ for (int i = 1; i < argc; ++i) {
+ const char* filename = argv[i];
+
+ for (int limit = 1 << 10; limit < (1<<20); limit *= 2) {
+ int64_t start = GetTimeMillis();
+ for (int rep = 0; rep < limit; ++rep) {
+ string buf;
+ string err;
+ if (ReadFile(filename, &buf, &err) < 0) {
+ printf("%s: %s\n", filename, err.c_str());
+ return 1;
+ }
+
+ DepfileParser parser;
+ if (!parser.Parse(&buf, &err)) {
+ printf("%s: %s\n", filename, err.c_str());
+ return 1;
+ }
+ }
+ int64_t end = GetTimeMillis();
+
+ if (end - start > 100) {
+ int delta = (int)(end - start);
+ float time = delta*1000 / (float)limit;
+ printf("%s: %.1fus\n", filename, time);
+ times.push_back(time);
+ break;
+ }
+ }
+ }
+
+ if (!times.empty()) {
+ float min = times[0];
+ float max = times[0];
+ float total = 0;
+ for (size_t i = 0; i < times.size(); ++i) {
+ total += times[i];
+ if (times[i] < min)
+ min = times[i];
+ else if (times[i] > max)
+ max = times[i];
+ }
+
+ printf("min %.1fus max %.1fus avg %.1fus\n",
+ min, max, total / times.size());
+ }
+
+ return 0;
+}