On second thought, leave Jan Psota's tables alone and just put

a footnote with my additional comments.

SVN-Revision: 2976

Author: kientzle

contrib/psota-benchmark/results.txt

@@ -45,7 +45,7 @@ bsdtar  extract         0.733   0.200   0.504   96.02       353358 KB/s
 gnutar  extract         0.625   0.092   0.508   96.02       414419 KB/s
 star    extract         0.875   0.096   0.980   100.00      296013 KB/s
 
-bsdtar  compare         0.001   0.000   0.000   0.00         N/A
+bsdtar  compare         0.001   0.000   0.000   0.00     259012000 KB/s
 gnutar  compare         0.719   0.288   0.400   95.66       360239 KB/s
 star    compare         0.695   0.224   0.636   100.00      372679 KB/s
 
@@ -66,7 +66,7 @@ bsdtar  extract         78.914  0.820   15.149  20.23        41932 KB/s
 gnutar  extract         78.480  0.196   14.197  18.33        42164 KB/s
 star    extract         79.439  0.132   12.973  16.49        41655 KB/s
 
-bsdtar  compare         0.001   0.000   0.000   0.00           N/A
+bsdtar  compare         0.001   0.000   0.000   0.00    3309080000 KB/s
 gnutar  compare         61.771  3.464   8.905   20.02        53570 KB/s
 star    compare         57.561  1.728   9.897   20.19        57488 KB/s
 
@@ -96,7 +96,7 @@ bsdtar  extract         1.186   0.172   1.012   99.87        95629 KB/s
 gnutar  extract         1.064   0.056   1.004   99.63       106593 KB/s
 star    extract         1.920   0.088   1.724   94.40        59070 KB/s
 
-bsdtar  compare         0.002   0.000   0.000   0.00           N/A
+bsdtar  compare         0.002   0.000   0.000   0.00      56708000 KB/s
 gnutar  compare         0.925   0.232   0.692   99.90       122611 KB/s
 star    compare         1.569   0.376   1.096   93.79        72285 KB/s
 
@@ -117,6 +117,20 @@ bsdtar  extract         94.912  4.476   31.574  37.98        22146 KB/s
 gnutar  extract         94.657  0.396   29.462  31.54        22206 KB/s
 star    extract         100.814 0.400   39.906  39.98        20849 KB/s
 
-bsdtar  compare         0.003   0.000   0.004   100.00         N/A
+bsdtar  compare         0.003   0.000   0.004   100.00   700657000 KB/s
 gnutar  compare         80.174  3.932   20.365  30.30        26217 KB/s
 star    compare         73.911  8.341   27.670  48.72        28439 KB/s
+
+=============================================================
+
+Note by Tim Kientzle:  The "bsdtar compare" results here are
+invalid since bsdtar does not support that operation.
+For the list numbers, note that libarchive automatically optimizes
+list operations on uncompressed tar archives on disk by using lseek()
+to skip over the bodies of entries.  GNU tar added an option to
+provide the same feature.
+
+The biggest problem with these tests is that they only
+cover uncompressed archives stored on disk.  The results for
+compressed archives and/or archives stored on tape are
+likely quite different.