bdest@unix.cis.pitt.edu (Benoit Desjardins) (02/14/91)
This is a summary of the results of Ken Hancock's study of the
compression utilities on the mac (Tidbits #42). Results were ROUNDED
OFF, to show more clearly the different categories of performance.
Performance wise, Compactor is clearly the best one.
+---------+---------+---------+
|Binaries |Graphics | Text |
+-----------------+-------+------------+----+----+----+----+----+----+
| Software |version| Cmp Method |%Cmp|time|%Cmp|time|%Cmp|time|
+-----------------+-------+------------+----+----+----+----+----+----+
| Compactor | 1.2.1 | n/a | 42 | 18 | 55 | 28 | 53 | 3 |
| Stuffit Deluxe | 2.0 | Best Guess | 42 | 36 | 55 | 39 | 53 | 13 |
| Stuffit Classic | 1.6 | Best Guess | 42 | 44 | 55 | 46 | 53 | 11 |
| Stuffit Deluxe | 2.0 | Better | 42 | 60 | 55 | 63 | 53 | 16 |
| Stuffit Classic | 1.6 | Better | 42 | 68 | 55 | 69 | 53 | 15 |
| Disk Doubler | 3.1 | Method B | 35 | 18 | 50 | 16 | 50 | 3 |
| Disk Doubler | 3.1 | Smallest | 35 | 25 | 50 | 23 | 50 | 4 |
| Disk Doubler | 3.1 | Method A | 25 | 8 | 50 | 7 | 50 | 2 |
| Stuffit Classic | 1.6 | Fast | 25 | 13 | 50 | 10 | 45 | 5 |
| Stuffit Deluxe | 2.0 | Fast | 25 | 14 | 50 | 12 | 45 | 10 |
| Stuffit | 1.5.1 | Both | 25 | 21 | 50 | 12 | 45 | 6 |
| Stuffit Deluxe | 2.0 | Optimal | 25 | 33 | 50 | 34 | 45 | 13 |
| Stuffit Deluxe | 2.0 | Faster | 14 | 6 | 33 | 6 | 27 | 10 |
+-----------------+-------+------------+----+----+----+----+----+----+
Binaries: 1.8 Megs of binary files in a directory
Graphics: 1.8 Megs of graphic files in a directory
Text: 222 K of text files in a directory
%Cmp: % of compression achieved (more is better)
time: time to compress (x 10 sec, on a SE/30) (less is better)