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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/predictors/loading_predictor_config.h"
#include "base/metrics/field_trial_params.h"
#include "chrome/browser/predictors/predictors_features.h"
#include "chrome/browser/preloading/preloading_prefs.h"
#include "chrome/browser/profiles/profile.h"
#include "third_party/blink/public/common/features.h"
namespace predictors {
bool IsLoadingPredictorEnabled(Profile* profile) {
// Disabled for off-the-record. Policy choice, not a technical limitation.
return profile && !profile->IsOffTheRecord();
}
bool IsPreconnectAllowed(Profile* profile) {
// Checks that the preconnect is allowed by user settings.
return profile && profile->GetPrefs() &&
(prefetch::IsSomePreloadingEnabled(*profile->GetPrefs()) ==
content::PreloadingEligibility::kEligible);
}
std::string GetStringNameForHintOrigin(HintOrigin hint_origin) {
switch (hint_origin) {
case HintOrigin::NAVIGATION:
return "Navigation";
case HintOrigin::OPTIMIZATION_GUIDE:
return "OptimizationGuide";
default:
NOTREACHED();
}
}
LoadingPredictorConfig::LoadingPredictorConfig()
: max_navigation_lifetime_seconds(base::GetFieldTrialParamByFeatureAsInt(
features::kLoadingPredictorTableConfig,
"max_navigation_lifetime_seconds",
60)),
max_hosts_to_track(base::GetFieldTrialParamByFeatureAsInt(
features::kLoadingPredictorTableConfig,
"max_hosts_to_track",
100)),
max_hosts_to_track_for_lcpp(
blink::features::kLCPCriticalPathPredictorMaxHostsToTrack.Get()),
max_origins_per_entry(base::GetFieldTrialParamByFeatureAsInt(
features::kLoadingPredictorTableConfig,
"max_origins_per_entry",
50)),
max_consecutive_misses(3),
max_redirect_consecutive_misses(5),
flush_data_to_disk_delay_seconds(30),
lcpp_multiple_key_histogram_sliding_window_size(
blink::features::kLcppMultipleKeyHistogramSlidingWindowSize.Get()),
lcpp_multiple_key_max_histogram_buckets(
blink::features::kLcppMultipleKeyMaxHistogramBuckets.Get()),
lcpp_initiator_origin_histogram_sliding_window_size(
blink::features::kLcppInitiatorOriginHistogramSlidingWindowSize
.Get()),
lcpp_initiator_origin_max_histogram_buckets(
blink::features::kLcppInitiatorOriginMaxHistogramBuckets.Get()) {}
LoadingPredictorConfig::LoadingPredictorConfig(
const LoadingPredictorConfig& other) = default;
LoadingPredictorConfig::~LoadingPredictorConfig() = default;
} // namespace predictors
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