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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Access Log /Filter/?
Date Wed, 03 Mar 2010 16:10:05 GMT
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Xie,

On 3/2/2010 6:20 PM, Xie Xiaodong wrote:
> Second, you are absolutely right about the log.info(....). I first
> wrote like this for testing and forgot to get it back to debug
> level.

Don't forget that calling log.debug() with a bunch of string
concatenations still performs those string concatenations. It's better
to do something like this:

if(log.isDebugEnabled())
  log.debug(something + something else + a third thing);

> In modern jvm, it does not matter much between StringBuffer and 
> StringBuilder, jvm will change StringBuffer used in single thread
> scenario into StringBuilder automaticlly.

No, it won't: if you ask for StringBuffer, you'll get a StringBuffer. If
you just do "a" + "b", the /compiler/ will use StringBuilder if your
target is 1.5+ but the JVM doesn't do anything like what you describe.

> You could google this information. There are some benchmark test
> about it.

I'd love to see an example demonstrating your claim.

- -chis
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