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author | Minteck <contact@minteck.org> | 2023-01-10 14:54:04 +0100 |
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committer | Minteck <contact@minteck.org> | 2023-01-10 14:54:04 +0100 |
commit | 99c1d9af689e5325f3cf535c4007b3aeb8325229 (patch) | |
tree | e663b3c2ebdbd67c818ac0c5147f0ce1d2463cda /alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js | |
parent | 9871b03912fc28ad38b4037ebf26a78aa937baba (diff) | |
download | pluralconnect-99c1d9af689e5325f3cf535c4007b3aeb8325229.tar.gz pluralconnect-99c1d9af689e5325f3cf535c4007b3aeb8325229.tar.bz2 pluralconnect-99c1d9af689e5325f3cf535c4007b3aeb8325229.zip |
Update - This is an automated commit
Diffstat (limited to 'alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js')
-rw-r--r-- | alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js b/alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js deleted file mode 100644 index 8659d30..0000000 --- a/alarm/node_modules/w3c-hr-time/lib/calculate-clock-offset.js +++ /dev/null @@ -1,39 +0,0 @@ -"use strict"; - -// This files implements the calculation of the offset between the global monotonic clock and UNIX time. This value is -// known as |t1| in the calculation of "time origin timestamp" in the spec. This value needs to be calculated once and -// can be used in all subsequent Performance instances. -// -// However, if the clock is not fast enough, the export is undefined to signify that we should use Date.now() to get the -// time origin timestamp with millisecond accuracy, per spec. - -const { getGlobalMonotonicClockMS } = require("./global-monotonic-clock"); -const clockIsAccurate = require("./clock-is-accurate"); - -// This function assumes the clock is accurate. -function calculateClockOffset() { - const start = Date.now(); - let cur = start; - // Limit the iterations, just in case we're running in an environment where Date.now() has been mocked and is - // constant. - for (let i = 0; i < 1e6 && cur === start; i++) { - cur = Date.now(); - } - - // At this point |cur| "just" became equal to the next millisecond -- the unseen digits after |cur| are approximately - // all 0, and |cur| is the closest to the actual value of the UNIX time. Now, get the current global monotonic clock - // value and do the remaining calculations. - - return cur - getGlobalMonotonicClockMS(); -} - -if (clockIsAccurate) { - // Warm up the function. - calculateClockOffset(); - calculateClockOffset(); - calculateClockOffset(); - - module.exports = calculateClockOffset; -} else { - module.exports = undefined; -} |