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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/predictors/loading_predictor_config.h" |
| 6 #include "chrome/browser/predictors/resource_prefetch_common.h" |
| 7 |
| 8 namespace predictors { |
| 9 |
| 10 bool IsLoadingPredictortEnabled(Profile* profile, |
| 11 LoadingPredictorConfig* config) { |
| 12 return IsSpeculativeResourcePrefetchingEnabled(profile, config); |
| 13 } |
| 14 |
| 15 LoadingPredictorConfig::LoadingPredictorConfig() |
| 16 : mode(0), |
| 17 max_navigation_lifetime_seconds(60), |
| 18 max_urls_to_track(500), |
| 19 max_hosts_to_track(200), |
| 20 min_url_visit_count(2), |
| 21 max_resources_per_entry(50), |
| 22 max_origins_per_entry(50), |
| 23 max_consecutive_misses(3), |
| 24 max_redirect_consecutive_misses(5), |
| 25 min_resource_confidence_to_trigger_prefetch(0.7f), |
| 26 min_resource_hits_to_trigger_prefetch(2), |
| 27 max_prefetches_inflight_per_navigation(5), |
| 28 max_prefetches_inflight_per_host_per_navigation(3), |
| 29 is_url_learning_enabled(false), |
| 30 is_manifests_enabled(false), |
| 31 is_origin_learning_enabled(false) {} |
| 32 |
| 33 LoadingPredictorConfig::LoadingPredictorConfig( |
| 34 const LoadingPredictorConfig& other) = default; |
| 35 |
| 36 LoadingPredictorConfig::~LoadingPredictorConfig() = default; |
| 37 |
| 38 bool LoadingPredictorConfig::IsLearningEnabled() const { |
| 39 return (mode & LEARNING) > 0; |
| 40 } |
| 41 |
| 42 bool LoadingPredictorConfig::IsPrefetchingEnabledForSomeOrigin( |
| 43 Profile* profile) const { |
| 44 int mask = PREFETCHING_FOR_NAVIGATION | PREFETCHING_FOR_EXTERNAL; |
| 45 return internal::IsPrefetchingEnabledInternal(profile, mode, mask); |
| 46 } |
| 47 |
| 48 bool LoadingPredictorConfig::IsPrefetchingEnabledForOrigin( |
| 49 Profile* profile, |
| 50 HintOrigin origin) const { |
| 51 int mask = 0; |
| 52 switch (origin) { |
| 53 case HintOrigin::NAVIGATION: |
| 54 mask = PREFETCHING_FOR_NAVIGATION; |
| 55 break; |
| 56 case HintOrigin::EXTERNAL: |
| 57 mask = PREFETCHING_FOR_EXTERNAL; |
| 58 break; |
| 59 } |
| 60 return internal::IsPrefetchingEnabledInternal(profile, mode, mask); |
| 61 } |
| 62 |
| 63 bool LoadingPredictorConfig::IsLowConfidenceForTest() const { |
| 64 return min_url_visit_count == 1 && |
| 65 std::abs(min_resource_confidence_to_trigger_prefetch - 0.5f) < 1e-6 && |
| 66 min_resource_hits_to_trigger_prefetch == 1; |
| 67 } |
| 68 |
| 69 bool LoadingPredictorConfig::IsHighConfidenceForTest() const { |
| 70 return min_url_visit_count == 3 && |
| 71 std::abs(min_resource_confidence_to_trigger_prefetch - 0.9f) < 1e-6 && |
| 72 min_resource_hits_to_trigger_prefetch == 3; |
| 73 } |
| 74 |
| 75 bool LoadingPredictorConfig::IsMoreResourcesEnabledForTest() const { |
| 76 return max_resources_per_entry == 100; |
| 77 } |
| 78 |
| 79 bool LoadingPredictorConfig::IsSmallDBEnabledForTest() const { |
| 80 return max_urls_to_track == 200 && max_hosts_to_track == 100; |
| 81 } |
| 82 |
| 83 } // namespace predictors |
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