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pyfec: bump the performance measurement bragging up higher in the README

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Zooko O'Whielacronx 2007-04-14 18:03:54 -07:00
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1 changed files with 22 additions and 22 deletions
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pyfec/README.txt
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@ -86,6 +86,28 @@ Privacy Guard" for encryption. It is important to do things in order: first
package, then compress, then encrypt, then erasure code.
* Performance Measurements
On my Athlon 64 2.4 GHz workstation (running Linux), the "fec" command-line
tool encoded a 160 MB file with m=100, k=94 (about 6% redundancy) in 3.9
seconds, where the "par2" tool encoded the file with about 6% redundancy in
27 seconds. "fec" encoded the same file with m=12, k=6 (100% redundancy) in
4.1 seconds, where par2 encoded it with about 100% redundancy in 7 minutes
and 56 seconds.
The underlying C library in benchmark mode encoded from a file at about
4.9 million bytes per second and decoded at about 5.8 million bytes per second.
On Peter's fancy Intel Mac laptop (2.16 GHz Core Duo), it encoded from a file
at about 6.2 million bytes per second.
On my even fancier Intel Mac laptop (2.33 GHz Core Duo), it encoded from a file
at about 6.8 million bytes per second.
On my old PowerPC G4 867 MHz Mac laptop, it encoded from a file at about 1.3
million bytes per second.
* API
Each block is associated with "blocknum". The blocknum of each primary block is
@ -169,28 +191,6 @@ Python interpreter is also required. We have tested it with Python v2.4 and
v2.5.
* Performance Measurements
On my Athlon 64 2.4 GHz workstation (running Linux), the "fec" command-line
tool encoded a 160 MB file with m=100, k=94 (about 6% redundancy) in 3.9
seconds, where the "par2" tool encoded the file with about 6% redundancy in
27 seconds. "fec" encoded the same file with m=12, k=6 (100% redundancy) in
4.1 seconds, where par2 encoded it with about 100% redundancy in 7 minutes
and 56 seconds.
The underlying C library in benchmark mode encoded from a file at about
4.9 million bytes per second and decoded at about 5.8 million bytes per second.
On Peter's fancy Intel Mac laptop (2.16 GHz Core Duo), it encoded from a file
at about 6.2 million bytes per second.
On my even fancier Intel Mac laptop (2.33 GHz Core Duo), it encoded from a file
at about 6.8 million bytes per second.
On my old PowerPC G4 867 MHz Mac laptop, it encoded from a file at about 1.3
million bytes per second.
* Acknowledgements
Thanks to the author of the original fec lib, Luigi Rizzo, and the folks that