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From "Ben Wong" <bw...@adaptiveinternational.com>
Subject RE: GetMethod Performance
Date Tue, 17 Feb 2004 10:10:26 GMT
I am running the same code on both boxes, even the same JAR file. I am
not sure why crypto is involved as I was only retrieving content over
HTTP. I used the HttpClient to download a zip file off a Web server in
the LAN. It should take no time to download it.

With the wire log, I have actually removed the log4j.properties file
completely from the class path, so it shouldn't be affecting the
performance should it?

Thanks,
Ben

-----Original Message-----
From: Kalnichevski, Oleg [mailto:oleg.kalnichevski@bearingpoint.com] 
Sent: Tuesday, 17 February 2004 8:12 PM
To: Commons HttpClient Project
Subject: RE: GetMethod Performance

Ben,
The profiles obviously differ quite a bit. For instance the methods
below that consume a significant portion of the execution time on
Solaris platform take virtually no time on WinXP. Are they executed at
all? Are you sure you execute exactly the same code on both platforms?
Anyhow, as Roland said, the problem is clearly related to crypto
algorithms on the Solaris platform.

= Solaris ================================================
  Interpreted + native   Method
  5.6%    18  +     6    java.math.BigInteger.mulAdd
  3.3%    14  +     0    sun.security.provider.SHA.computeBlock
  3.0%    13  +     0    java.math.BigInteger.addOne
  2.8%    11  +     1    sun.nio.cs.StreamDecoder.read
===========================================================

One additional note: please make sure that you have debug/wire log
turned off when conducting performance measurement, otherwise you simply
end up measuring the speed of console output

Oleg

-----Original Message-----
From: Ben Wong [mailto:bwong@adaptiveinternational.com]
Sent: Monday, February 16, 2004 23:40
To: 'Commons HttpClient Project'
Subject: RE: GetMethod Performance


Windows Profile attached. Any help would be appreciated

Windows XP on P-M 1.4
---------------------
Flat profile of 3.44 secs (322 total ticks): main

  Interpreted + native   Method                        
  7.5%     0  +    24    java.net.SocketInputStream.socketRead0
  7.2%     0  +    23    java.net.PlainSocketImpl.socketConnect
  1.3%     0  +     4    java.net.Inet4AddressImpl.lookupAllHostAddr
  0.6%     0  +     2    java.io.WinNTFileSystem.getBooleanAttributes
  0.6%     0  +     2    java.lang.System.arraycopy
  0.6%     1  +     1    java.net.URL.<init>
  0.3%     0  +     1    java.lang.reflect.Field.copy
  0.3%     0  +     1    java.util.HashMap.hash
  0.3%     0  +     1
org.apache.commons.logging.impl.LogFactoryImpl.newInstance
  0.3%     0  +     1    sun.misc.URLClassPath$5.<init>
  0.3%     1  +     0    org.apache.log4j.Priority.isGreaterOrEqual
  0.3%     0  +     1    java.lang.String.<init>
  0.3%     1  +     0    java.nio.charset.CharsetDecoder.<init>
  0.3%     0  +     1    sun.nio.cs.UTF_8.newDecoder
  0.3%     0  +     1    java.lang.String.substring
  0.3%     1  +     0    java.nio.charset.CharsetDecoder.<init>
  0.3%     1  +     0    java.util.HashMap.transfer
  0.3%     0  +     1    sun.text.ComposedCharIter.decomposition
  0.3%     0  +     1    sun.security.x509.AlgorithmId.derEncode
  0.3%     0  +     1    java.security.SecureClassLoader.getPermissions
  0.3%     0  +     1    java.lang.ClassLoader.defineClass0
  0.3%     1  +     0    java.lang.String.<init>
  0.3%     0  +     1    java.net.PlainSocketImpl.socketBind
  0.3%     0  +     1    java.lang.StringCoding$CharsetSE.encode
  0.3%     1  +     0    java.lang.String.regionMatches
 28.8%    10  +    82    Total interpreted (including elided)

     Compiled + native   Method                        
 15.6%     9  +    41    java.lang.String.getChars
  7.5%    24  +     0    sun.nio.cs.US_ASCII$Decoder.decodeArrayLoop
  6.6%    12  +     9    java.lang.String.<init>
  3.8%    12  +     0    java.nio.charset.CharsetDecoder.decode
  3.4%    11  +     0    java.lang.Integer.toUnsignedString
  2.8%     9  +     0    sun.nio.cs.StreamDecoder.read0
  2.8%     9  +     0    java.nio.Buffer.position
  2.8%     7  +     2    java.lang.StringBuffer.append
  2.8%     9  +     0    java.util.HashMap.get
  2.5%     8  +     0    java.nio.CharBuffer.wrap
  1.9%     6  +     0    java.nio.Buffer.<init>
  1.6%     0  +     5    java.lang.StringBuffer.insert
  1.6%     5  +     0    sun.nio.cs.StreamDecoder$CharsetSD.implRead
  1.3%     4  +     0    org.apache.commons.httpclient.Wire.wire
  1.3%     1  +     3    java.lang.StringBuffer.expandCapacity
  0.9%     3  +     0    sun.nio.cs.US_ASCII$Decoder.decodeLoop
  0.9%     3  +     0    java.nio.charset.CoderResult$Cache.get
  0.9%     3  +     0    java.nio.CharBuffer.put
  0.9%     3  +     0    java.nio.Buffer.limit
  0.9%     3  +     0    java.lang.StringBuffer.append
  0.6%     2  +     0    java.util.HashMap.hash
  0.6%     2  +     0    java.io.InputStreamReader.read
  0.6%     2  +     0    java.lang.Integer.equals
  0.3%     0  +     1    org.apache.log4j.Category.log
  0.3%     1  +     0    java.nio.CharBuffer.arrayOffset
 66.6%   152  +    61    Total compiled (including elided)

  Thread-local ticks:
  0.6%     2             Blocked (of total)
  0.6%     2             Class loader
  1.3%     4             Interpreter
  2.8%     9             Compilation


Flat profile of 0.01 secs (1 total ticks): DestroyJavaVM

  Thread-local ticks:
100.0%     1             Blocked (of total)


Global summary of 3.45 seconds:
100.0%   345             Received ticks
  5.8%    20             Received GC ticks
  4.1%    14             Compilation
  0.3%     1             Other VM operations
  0.6%     2             Class loader
  1.2%     4             Interpreter






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