diff options
Diffstat (limited to 'includes/external/school/node_modules/w3c-hr-time/lib/performance.js')
-rw-r--r-- | includes/external/school/node_modules/w3c-hr-time/lib/performance.js | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/includes/external/school/node_modules/w3c-hr-time/lib/performance.js b/includes/external/school/node_modules/w3c-hr-time/lib/performance.js deleted file mode 100644 index 4bcfbc3..0000000 --- a/includes/external/school/node_modules/w3c-hr-time/lib/performance.js +++ /dev/null @@ -1,53 +0,0 @@ -"use strict"; - -// Actual implementation of the Performance class. - -const clockIsAccurate = require("./clock-is-accurate"); -const calculateClockOffset = require("./calculate-clock-offset"); -const { hrtime, toMS } = require("./utils"); - -const kTimeOrigin = Symbol("time origin"); -const kTimeOriginTimestamp = Symbol("time origin timestamp"); - -class Performance { - constructor() { - // Time origin. - const timeOrigin = hrtime(); - this[kTimeOrigin] = timeOrigin; - - if (clockIsAccurate) { - // Let |t1| be the DOMHighResTimeStamp representing the high resolution Unix time at which the global monotonic - // clock is zero. This has to be calculated for every Performance object to account for clock drifts. - const t1 = calculateClockOffset(); - - // Let |t2| be the DOMHighResTimeStamp representing the high resolution time value of the global monotonic clock - // at global's time origin. - const t2 = toMS(timeOrigin); - - // Return the sum of |t1| and |t2|. - this[kTimeOriginTimestamp] = t1 + t2; - } else { - // Clock isn't accurate enough. Use millisecond accuracy per spec. - const cur = Date.now(); - this[kTimeOriginTimestamp] = cur; - } - } - - // The timeOrigin getter actually returns the time origin timestamp, not the raw time origin. - get timeOrigin() { - return this[kTimeOriginTimestamp]; - } - - now() { - const diff = toMS(hrtime(this[kTimeOrigin])); - return clockIsAccurate ? diff : Math.round(diff); - } - - toJSON() { - return { - timeOrigin: this.timeOrigin - }; - } -} - -module.exports = { Performance }; |