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const {
Symbol,
Date,
DatePrototypeGetMilliseconds,
DatePrototypeToUTCString,
} = primordials;
const { setUnrefTimeout } = require('internal/timers');
const { InternalPerformanceEntry } = require('internal/perf/performance_entry');
const {
enqueue,
hasObserver,
} = require('internal/perf/observe');
const { now } = require('internal/perf/utils');
let utcCache;
function utcDate() {
if (!utcCache) cache();
return utcCache;
}
function cache() {
const d = new Date();
utcCache = DatePrototypeToUTCString(d);
setUnrefTimeout(resetCache, 1000 - DatePrototypeGetMilliseconds(d));
}
function resetCache() {
utcCache = undefined;
}
function emitStatistics(statistics) {
if (!hasObserver('http') || statistics == null) return;
const startTime = statistics.startTime;
const entry = new InternalPerformanceEntry(
statistics.type,
'http',
startTime,
now() - startTime,
undefined,
);
enqueue(entry);
}
module.exports = {
kOutHeaders: Symbol('kOutHeaders'),
kNeedDrain: Symbol('kNeedDrain'),
utcDate,
emitStatistics,
};
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