[logback-dev] [JIRA] Issue Comment Edited: (LBCLASSIC-36) Synchronization of SimpleDateFormat object in DateConverter
ceki at qos.ch
Sun Jun 14 22:07:52 CEST 2009
Thorbjoern Ravn Andersen wrote:
> Ceki Gulcu (JIRA) skrev:
>> Just as importantly, logback will invoke Yoda time or
>> SimpleDateformat, at most once per millisecond. So the performance of
>> SimpleDateformat as well as Yoda time are as satisfactory as they are
>> unimportant. Only the performance of System.currentMillis really matters.
> "once per millisecond" does not merit unimportance as this might mean
> 1000 times per second.
True. However, keep in mind that the computation performed 1000 per second takes
> Would a reasonable optimization be "once per second" with the
> miliseconds being hacked in afterwards?
Reasonable? Well, certainly!
Assuming the 2 microsecond cost is too much (which I find iffy), we
could add another conversion word, say, %optiTime, which would have a
precision of a second but not milliseconds. For milliseconds, the user
would use, say the %millis converter. This would gains us 2microseconds x
1000 per second, or 2 milliseconds per second, if the application was
doing logging and nothing else.
It's too much of a hassle and not worth the effort if you ask me.
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