style_perftest.cc | Explore in Territory

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// A benchmark to verify style performance (and also hooks into layout,
// but not generally layout itself). This isolates style from paint etc.,
// for more stable benchmarking and profiling. Note that this test
// depends on external JSON files with stored web pages, which are
// not yet checked in. The tests will be skipped if you don't have the
// files available.

#include <string_view>

#include "base/command_line.h"
#include "base/containers/span.h"
#include "base/json/json_reader.h"
#include "testing/perf/perf_result_reporter.h"
#include "testing/perf/perf_test.h"
#include "third_party/blink/renderer/core/css/container_query_data.h"
#include "third_party/blink/renderer/core/css/parser/css_tokenizer.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver.h"
#include "third_party/blink/renderer/core/css/style_change_reason.h"
#include "third_party/blink/renderer/core/css/style_engine.h"
#include "third_party/blink/renderer/core/css/style_recalc_change.h"
#include "third_party/blink/renderer/core/css/style_sheet_contents.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/dom_token_list.h"
#include "third_party/blink/renderer/core/dom/node_computed_style.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/html/html_body_element.h"
#include "third_party/blink/renderer/core/loader/empty_clients.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/core/testing/no_network_url_loader.h"
#include "third_party/blink/renderer/core/testing/page_test_base.h"
#include "third_party/blink/renderer/platform/heap/process_heap.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/url_test_helpers.h"

namespace blink {

// The HTML left by the dumper script will contain any <style> tags that were
// in the DOM, which will be interpreted by setInnerHTML() and converted to
// style sheets. However, we already have our own canonical list of sheets
// (from the JSON) that we want to use. Keeping both will make for duplicated
// rules, enabling rules and sheets that have since been deleted
// (occasionally even things like “display: none !important”) and so on.
// Thus, as a kludge, we strip all <style> tags from the HTML here before
// parsing.
static WTF::String StripStyleTags(const WTF::String& html) { … }

static std::unique_ptr<DummyPageHolder> LoadDumpedPage(
    const base::Value::Dict& dict,
    base::TimeDelta& parse_time,
    perf_test::PerfResultReporter* reporter) { … }

struct StylePerfResult { … };

static StylePerfResult MeasureStyleForDumpedPage(
    const char* filename,
    bool parse_only,
    perf_test::PerfResultReporter* reporter) { … }

static void MeasureAndPrintStyleForDumpedPage(const char* filename,
                                              const char* label) { … }

TEST(StyleCalcPerfTest, Video) { … }

TEST(StyleCalcPerfTest, Extension) { … }

TEST(StyleCalcPerfTest, News) { … }

TEST(StyleCalcPerfTest, ECommerce) { … }

TEST(StyleCalcPerfTest, Social1) { … }

TEST(StyleCalcPerfTest, Social2) { … }

TEST(StyleCalcPerfTest, Encyclopedia) { … }

TEST(StyleCalcPerfTest, Sports) { … }

TEST(StyleCalcPerfTest, Search) { … }

// The data set for this test is not checked in, so if you want to measure it,
// you will need to recreate it yourself. You can do so using the script in
//
//   third_party/blink/renderer/core/css/scripts/style_perftest_snap_page
//
// And the URL set to use is the top 1k URLs from
//
//   tools/perf/page_sets/alexa1-10000-urls.json
TEST(StyleCalcPerfTest, Alexa1000) { … }

}  // namespace blink
chromium/third_party/blink/renderer/core/css/style_perftest.cc
