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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 "components/page_load_metrics/common/page_load_metrics_util.h"
#include <algorithm>
#include <string_view>
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_util.h"
namespace page_load_metrics {
namespace {
// Default timer delay value.
const int kBaseBufferTimerDelayMillis = 100;
// Additional delay for the browser timer relative to the renderer timer, to
// allow for some variability in task queuing duration and IPC latency.
const int kExtraBufferTimerDelayMillis = 50;
} // namespace
std::optional<base::TimeDelta> OptionalMin(
const std::optional<base::TimeDelta>& a,
const std::optional<base::TimeDelta>& b) {
if (a && !b)
return a;
if (b && !a)
return b;
if (!a && !b)
return a; // doesn't matter which
return std::optional<base::TimeDelta>(std::min(a.value(), b.value()));
}
int GetBufferTimerDelayMillis(TimerType timer_type) {
int result = kBaseBufferTimerDelayMillis;
DCHECK(timer_type == TimerType::kBrowser ||
timer_type == TimerType::kRenderer);
if (timer_type == TimerType::kBrowser) {
result += kExtraBufferTimerDelayMillis;
}
return result;
}
} // namespace page_load_metrics
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