firefox-main/tools/performance
Name Description Size Coverage
moz.build 576 -
PageloadEvent.cpp static 11581 -
PageloadEvent.h Features utilized within a document, represented as bitfield in the pageload event. 4987 100 %
Perfetto.cpp 1071 -
Perfetto.h Perfetto Tracing: This file provides an interface to the perfetto tracing API. The API from the perfetto sdk can be used directly, but an additional set of macros prefixed with PERFETTO_* have been defined to help minimize the use of ifdef's. The common perfetto macros require a category and name at the very least. These must be static strings, or wrapped with perfetto::DynamicString if dynamic. If the string is static, but provided through a runtime pointer, then it must be wrapped with perfetto::StaticString. You can also provide additional parameters such as a timestamp, or a lambda to add additional information to the trace marker. For more info, see https://perfetto.dev/docs/instrumentation/tracing-sdk Examples: // Add a trace event to measure work inside a block, // using static strings only. { PERFETTO_TRACE_EVENT("js", "JS::RunScript"); run_script(); } // Add a trace event to measure work inside a block, // using a dynamic string. void runScript(nsCString& scriptName) { PERFETTO_TRACE_EVENT("js", perfetto::DynamicString{scriptName.get()}); run_script(); } // Add a trace event using a dynamic category and name. void runScript(nsCString& categoryName, nsCString& scriptName) { perfetto::DynamicCategory category{category.get()}; PERFETTO_TRACE_EVENT(category, perfetto::DynamicString{scriptName.get()}); run_script(); } // Add a trace event to measure two arbitrary points of code. // Events in the same category must always be nested. void startWork() { PERFETTO_TRACE_EVENT_BEGIN("js", "StartWork"); ... PERFETTO_TRACE_EVENT_END("js"); } // Create a trace marker for an event that has already occurred // using previously saved timestamps. void record_event(TimeStamp startTimeStamp, TimeStamp endTimeStamp) { PERFETTO_TRACE_EVENT_BEGIN("js", "Some Event", startTimeStamp); PERFETTO_TRACE_EVENT_END("js", endTimeStamp); } 13294 100 %
PerfStats.cpp 9067 -