Differences between revisions 4 and 6 (spanning 2 versions)
⇤ ← Revision 4 as of 2007-11-15 16:35:41 →
Size: 2642
Editor: PhilipJenvey
Comment: mention read speed
← Revision 6 as of 2007-11-15 23:19:20 → ⇥
Size: 15
Editor: PhilipJenvey
Comment: FreeBSD's java doesn't give me a good read() benchmark, have to redo these
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Some PyFile benchmarks, mostly to show off the PyFile nio rewrite

Tests done on FreeBSD 6.2-RELEASE, Java 1.5.0_13 in server mode and Python 2.5.1

(If anyone's worried about FreeBSD Java, the times are in line with OS X's Java 1.5)

Preparations: 100
Iterations: 5

Notes:

* jython's file iter is roughly equivalent to its readline, whereas CPython's readline is not as optimized as its iter

* The few anomalies in the smaller benchmarks are probably due to hotspot kicking in. Ideally we would run more preparations

* why is read slower than iter? seems like a lot of time is spent in allocating the ByteBuffer whereas iter uses a pre-allocated, small one.

Reading:

{{{#!python
    def test_read(self, fp):
        fp.read()
    test_read = bench(test_read)
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_read.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_read.jpg]

{{{#!python
    def test_iter(self, fp):
        for line in fp:
            pass
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_iter.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_iter.jpg]

{{{#!python
    def test_readline(self, fp):
        while fp.readline():
            pass
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_readline.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_readline.jpg]

{{{#!python
    def test_readline_with_tell(self, fp):
        while fp.readline():
            fp.tell()
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_readline_with_tell.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_readline_with_tell.jpg]

{{{#!python
    def test_readlines(self, fp):
        fp.readlines()
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_readlines.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_readlines.jpg]

Writing:

{{{#!python
MSG = ('abcdefghijklmnopqrstuvwxyz1234567890abcdefghijklmnopqrstuvwxyz123456789'
       '0abcdefgh\r\n')
}}}

{{{#!python
    def test_write(self, fp, lines):
        write = fp.write
        for i in range(lines):
            write(MSG)
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_write.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_write.jpg]

{{{#!python
    def test_writelines(self, fp, lines):
        lines = [MSG for i in range(lines)]
        fp.writelines(lines)
}}}
[http://underboss.org/~pjenvey/jython/pyfile-nio/small/test_writelines.jpg]
[http://underboss.org/~pjenvey/jython/pyfile-nio/big/test_writelines.jpg]		 Coming soon..

Coming soon..

PyFileBenchmarks (last edited 2009-02-24 20:53:52 by PhilipJenvey)