Re: [jetty-dev] NIO inefficiency?

[Viktor Szathmary <phraktle@xxxxxxxxx>]

Hi,

On Friday, August 9, 2013 at 12:51 PM, Kristian Rosenvold wrote:

Your profiler dump gives a hint:

2.4% - org.eclipse.jetty.server.HttpChannel.write

1.5% - org.eclipse.jetty.server.HttpOutput.flush

1.3% - java.util.zip.DeflaterOutputStream.flush

...

If I'm not entirely mistaken, the DeflaterOutputStream does

on-the-fly compression of data, in which case you might be looking at

the overhead from the "Deflate" compression algorithm ? If you look

further down the graph I wouldn't be surprised if that's seeping

through on several of the methods ?

The overhead of compression is clearly on a different path (which is taking ~15%), so that's not it.

(Btw, I had a prior contribution for speeding up gzip compression by reusing Deflaters: https://bugs.eclipse.org/bugs/show_bug.cgi?id=402885).

Regards,

  Viktor