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9f3cf862e8
PerformanceTiming::monotonic_timestamp_to_wall_time_milliseconds assumes all DocumentLoadTimingInfo values are monotonic timestamps and converts them via wall_time = timestamp - epoch. This is correct for navigation_start_time (a true monotonic timestamp), but wrong for all other timing fields like load_event_end_time, dom_complete_time etc., which are stored as relative timestamps via current_high_resolution_time() (relative to time origin). The computed wall clock value ends up off by navigation_start_time, causing convert_name_to_timestamp() to return wrapped-around u64 values. This broke performance.measure() when using navigation timing attribute names as start/end marks. Add relative_timestamp_to_wall_time_milliseconds which adds back navigation_start_time before the epoch subtraction, producing correct UTC epoch ms for these fields.
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2025, Tim Ledbetter <tim.ledbetter@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/Window.h>
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namespace Web::NavigationTiming {
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class PerformanceTiming final : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(PerformanceTiming, Bindings::PlatformObject);
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GC_DECLARE_ALLOCATOR(PerformanceTiming);
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public:
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using AllowOwnPtr = TrueType;
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~PerformanceTiming();
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u64 navigation_start()
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{
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return monotonic_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.navigation_start_time; });
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}
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u64 unload_event_start() { return 0; }
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u64 unload_event_end() { return 0; }
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u64 redirect_start() { return 0; }
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u64 redirect_end() { return 0; }
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u64 fetch_start() { return 0; }
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u64 domain_lookup_start() { return 0; }
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u64 domain_lookup_end() { return 0; }
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u64 connect_start() { return 0; }
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u64 connect_end() { return 0; }
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u64 secure_connection_start() { return 0; }
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u64 request_start() { return 0; }
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u64 response_start() { return 0; }
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u64 response_end() { return 0; }
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u64 dom_loading() { return 0; }
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u64 dom_interactive()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.dom_interactive_time; });
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}
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u64 dom_content_loaded_event_start()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.dom_content_loaded_event_start_time; });
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}
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u64 dom_content_loaded_event_end()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.dom_content_loaded_event_end_time; });
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}
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u64 dom_complete()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.dom_complete_time; });
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}
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u64 load_event_start()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.load_event_start_time; });
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}
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u64 load_event_end()
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{
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return relative_timestamp_to_wall_time_milliseconds([](auto& load_info) { return load_info.load_event_end_time; });
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}
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private:
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explicit PerformanceTiming(JS::Realm&);
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DOM::DocumentLoadTimingInfo const& document_load_timing_info(JS::Object const& global_object) const;
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u64 monotonic_timestamp_to_wall_time_milliseconds(Function<HighResolutionTime::DOMHighResTimeStamp(DOM::DocumentLoadTimingInfo const&)> selector) const;
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u64 relative_timestamp_to_wall_time_milliseconds(Function<HighResolutionTime::DOMHighResTimeStamp(DOM::DocumentLoadTimingInfo const&)> selector) const;
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virtual void initialize(JS::Realm&) override;
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};
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}
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