Bug 50844

Summary:	DateFormat.getDateTimeInstance() is very expensive, we can cache it to improve performance
Product:	Log4j - Now in Jira	Reporter:	Xiaoming Shi <xiaoming>
Component:	Other	Assignee:	log4j-dev <log4j-dev>
Status:	NEW ---
Severity:	normal
Priority:	P2
Version:	1.2
Target Milestone:	---
Hardware:	PC
OS:	All

Description Xiaoming Shi 2011-02-28 22:11:22 UTC

In the file :
./src/main/java/org/apache/log4j/lf5/util/DateFormatManager.java line:229

We can cache the result by adding a static class member field. 

This is the same as the Bug 48778

Comment 1 Lily 2011-05-05 05:52:13 UTC

We faced the similar problem for performance of log4j. Basically we log a bunch of messages for each http request. Then, we found that http response time gets hits. So what we ended up was to first log each message to a StringBuffer, after some messages are logged, i.e. 100, we then call log4j api to log. This has improved the response time. However, we still see a response hit when the chunk of messages
are written to file.

Lily
http://www.alldiscountbooks.net