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From "Kalnichevski, Oleg" <oleg.kalnichev...@bearingpoint.com>
Subject RE: GetMethod Performance
Date Tue, 17 Feb 2004 09:12:25 GMT
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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