1925051 - Avoid Mutex overhead when checking DateTime cached UTC-to-local offset

Status: RESOLVED FIXED

(Core :: JavaScript: Standard Library, enhancement)

Description

[André Bargull [:anba]]

Date.prototype.get{FullYears,Month,Date,Hours,Minutes,Seconds} spend almost half their execution time in acquiring the DateTimeInfo::instance mutex.

Comment 1

[André Bargull [:anba]]

Attachment: Bug 1925051: Cache utc-to-local offset in Atomic to avoid mutex overhead. r=jandem!

This reduces the time needed to call get{FullYears,Month,Date,Hours,Minutes,Seconds}
by 40-45%.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ba249529f7cc
Cache utc-to-local offset in Atomic to avoid mutex overhead. r=jandem

Comment 3

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/ba249529f7cc