Robert Engels wrote:
Do you have any hard numbers to support this? The last time I checked, gcj
had minimal improvement over JVM 1.5.
In terms of speed, there is not much difference between native code and
classes (see sample timings). However, the pragmatic availability of
java 5 environment for even somewhat _exotic_ platforms is sadly
limited. My current environment is linux on a dual core x86_64.
One can only ride a jrocket into 1.5 land and still address 64 bits of
goodness !
more,
l8r,
v
BTW, given a native compile and link,
[EMAIL PROTECTED] lucene-415145]$ ldd build/indexFiles
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003f00400000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003efec00000)
libgcj.so.7 => /usr/lib64/libgcj.so.7 (0x00002aaaaaac2000)
libm.so.6 => /lib64/libm.so.6 (0x0000003ef9100000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003efa500000)
libz.so.1 => /usr/lib64/libz.so.1 (0x0000003ef9500000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003ef9300000)
libc.so.6 => /lib64/libc.so.6 (0x0000003ef8e00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003ef8c00000)
The native indexing,
[EMAIL PROTECTED] lucene-415145]$ time build/indexFiles . 2>&1 > /dev/null
real 0m22.932s
user 0m16.581s
sys 0m6.224s
The virtual machine indexing,
[EMAIL PROTECTED] lucene-415145]$ time java -d64 -Xmx8192m -cp
build/lucene-demos-2.0-rc1-dev.jar:build/lucene-core-2.0-rc1-dev.jar
org.apache.lucene.demo.IndexFiles . 2>&1 > /dev/null
real 0m23.224s
user 0m33.238s
sys 0m5.184s
Side note, the jrocket seems to use both processors just about 1/3 of
the way through, where as the gcj doesn't . . .
--
"The future is here. It's just not evenly distributed yet."
-- William Gibson, quoted by Whitfield Diffie
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