FYI: Xalan-J1 vs. Xalan-J2 performance

["Chris P. McCabe" <ch...@choicehotels.com>]

For those that are curious, I did a quick timing comparison between
Xalan-J1 and Xalan-J2 on some real-world test cases and the results are
summarized below.  All the pages shown were run several times and the
times are an average of all but the first run.  The first run includes
the compiling of the stylesheet.  All subsequent runs are using a cached
stylesheet.
  These are not benchmarks that exercise particular operations.  They
are just real-world cases.  Each page is generating HTML.

  Times are in milliseconds.  The first number in the pair is the first
run, the second is the average of all subsequent runs.

           Xalan-J1     Xalan-J2     Improvement
-------------------------------------------------
Page1      6605/1728    1420/1256    4.7x / 1.4x
Page2      2437/ 763     659/ 326    3.7x / 2.3x
Page3      2609/ 580     436/ 265    6.0x / 2.2x
Page4      2151/1446    1295/ 524    1.7x / 2.8x
Page5      3313/1142    1556/ 708    2.1x / 1.6x
Page6      4110/ 863    1573/ 538    2.6x / 1.6x
Page7      4954/2687    3508/2339    1.4x / 1.1x

Memory usage:  105K increase in memory usage with Xalan-J2 over 7 pages.



So as you can see, there is roughly a 2x speed improvement (where it
counts) with Xalan-J2 over Xalan-J1.  Good work guys!!

Chris