Add performance tests for the proxy resolver implementations....

net/proxy/proxy_resolver_perftest.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/perftimer.h"
+#include "net/proxy/proxy_resolver_v8.h"
+#include "net/url_request/url_request_unittest.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_WIN)
+#include "net/proxy/proxy_resolver_winhttp.h"
+#elif defined(OS_MACOSX)
+#include "net/proxy/proxy_resolver_mac.h"
+#endif
+
+// This class holds the URL to use for resolving, and the expected result.
+// We track the expected result in order to make sure the performance
+// test is actually resolving URLs properly, otherwise the perf numbers
+// are meaningless :-)
+struct PacQuery {
+  const char* query_url;
+  const char* expected_result;
+};
+
+// Entry listing which PAC scripts to load, and which URLs to try resolving.
+// |queries| should be terminated by {NULL, NULL}. A sentinel is used 
+// rather than a length, to simplify using initializer lists.
+struct PacPerfTest {
+  const char* pac_name;
+  PacQuery queries[100];
+
+  // Returns the actual number of entries in |queries| (assumes NULL sentinel).
+  int NumQueries() const;
+};
+
+// List of performance tests.
+static PacPerfTest kPerfTests[] = {
+  // This test uses an ad-blocker PAC script. This script is very heavily
+  // regular expression oriented, and has no dependencies on the current
+  // IP address, or DNS resolving of hosts.
+  { "no-ads.pac",
+    { // queries:
+      {"http://www.google.com", "DIRECT"},
+      {"http://www.imdb.com/photos/cmsicons/x", "PROXY 0.0.0.0:3421"},
+      {"http://www.imdb.com/x", "DIRECT"},
+      {"http://www.staples.com/", "DIRECT"},
+      {"http://www.staples.com/pixeltracker/x", "PROXY 0.0.0.0:3421"},
+      {"http://www.staples.com/pixel/x", "DIRECT"},
+      {"http://www.foobar.com", "DIRECT"},
+      {"http://www.foobarbaz.com/x/y/z", "DIRECT"},
+      {"http://www.testurl1.com/index.html", "DIRECT"},
+      {"http://www.testurl2.com", "DIRECT"},
+      {"https://www.sample/pirate/arrrrrr", "DIRECT"},
+      {NULL, NULL}
+    },
+  },
+};
+
+int PacPerfTest::NumQueries() const {
+  for (int i = 0; i < arraysize(queries); ++i) {
+    if (queries[i].query_url == NULL)
+      return i;
+  }
+  NOTREACHED();  // Bad definition.
+  return 0;
+}
+
+// The number of URLs to resolve when testing a PAC script.
+const int kNumIterations = 500;
+
+// Helper class to run through all the performance tests using the specified
+// proxy resolver implementation.
+class PacPerfSuiteRunner {
+ public:
+  // |resolver_name| is the label used when logging the results.
+  PacPerfSuiteRunner(net::ProxyResolver* resolver,
+                     const std::string& resolver_name)
+      : resolver_(resolver), resolver_name_(resolver_name) {
+  }
+
+  void RunAllTests() {
+    for (size_t i = 0; i < arraysize(kPerfTests); ++i) {
+      const PacPerfTest& test_data = kPerfTests[i];
+      RunTest(test_data.pac_name,
+              test_data.queries,
+              test_data.NumQueries());
+    }
+  }
+
+ private:
+  void RunTest(const std::string& script_name,
+               const PacQuery* queries,
+               int queries_len) {
+    GURL pac_url;
+
+    if (resolver_->does_fetch()) {
+      InitHttpServer();
+      pac_url = server_->TestServerPage(std::string("files/") + script_name);
+    } else {
+      LoadPacScriptIntoResolver(script_name);
+    }
+
+    // Do a query to warm things up. In the case of internal-fetch proxy
+    // resolvers, the first resolve will be slow since it has to download
+    // the PAC script.
+    {
+      net::ProxyInfo proxy_info;
+      int result = resolver_->GetProxyForURL(
+          GURL("http://www.warmup.com"), pac_url, &proxy_info);
+      ASSERT_EQ(net::OK, result);
+    }
+
+    // Start the perf timer.
+    std::string perf_test_name = resolver_name_ + "_" + script_name;
+    PerfTimeLogger timer(perf_test_name.c_str());
+
+    for (int i = 0; i < kNumIterations; ++i) {
+      // Round-robin between URLs to resolve.
+      const PacQuery& query = queries[i % queries_len];
+
+      // Resolve.
+      net::ProxyInfo proxy_info;
+      int result = resolver_->GetProxyForURL(GURL(query.query_url),
+                                             pac_url,
+                                             &proxy_info);
+
+      // Check that the result was correct. Note that ToPacString() and
+      // ASSERT_EQ() are fast, so they won't skew the results.
+      ASSERT_EQ(net::OK, result);
+      ASSERT_EQ(query.expected_result, proxy_info.ToPacString());
+    }
+
+    // Print how long the test ran for.
+    timer.Done();
+  }
+
+  // Lazily startup an HTTP server (to serve the PAC script).
+  void InitHttpServer() {
+    DCHECK(resolver_->does_fetch());
+    if (!server_) {
+      server_ = HTTPTestServer::CreateServer(
+          L"net/data/proxy_resolver_perftest", NULL);
+    }
+    ASSERT_TRUE(server_.get() != NULL);
+  }
+
+  // Read the PAC script from disk and initialize the proxy resolver with it.
+  void LoadPacScriptIntoResolver(const std::string& script_name) {
+    FilePath path;
+    PathService::Get(base::DIR_SOURCE_ROOT, &path);
+    path = path.AppendASCII("net");
+    path = path.AppendASCII("data");
+    path = path.AppendASCII("proxy_resolver_perftest");
+    path = path.AppendASCII(script_name);
+
+    // Try to read the file from disk.
+    std::string file_contents;
+    bool ok = file_util::ReadFileToString(path, &file_contents);
+
+    // If we can't load the file from disk, something is misconfigured.
+    LOG_IF(ERROR, !ok) << "Failed to read file: " << path.value();
+    ASSERT_TRUE(ok);
+
+    // Load the PAC script into the ProxyResolver.
+    resolver_->SetPacScript(file_contents);
+  }
+
+  net::ProxyResolver* resolver_;
+  std::string resolver_name_;
+  scoped_refptr<HTTPTestServer> server_;
+};
+
+#if defined(OS_WIN)
+TEST(ProxyResolverPerfTest, ProxyResolverWinHttp) {
+  net::ProxyResolverWinHttp resolver;
+  PacPerfSuiteRunner runner(&resolver, "ProxyResolverWinHttp");
+  runner.RunAllTests();
+}
+#elif defined(OS_MACOSX)
+TEST(ProxyResolverPerfTest, ProxyResolverMac) {
+  net::ProxyResolverMac resolver;
+  PacPerfSuiteRunner runner(&resolver, "ProxyResolverMac");
+  runner.RunAllTests();
+}
+#endif
+
+TEST(ProxyResolverPerfTest, ProxyResolverV8) {
+  net::ProxyResolverV8 resolver;
+  PacPerfSuiteRunner runner(&resolver, "ProxyResolverV8");
+  runner.RunAllTests();
+}