Timings[1]
                  Counts[2]         NO inode state        W/inode state
Tree    Size  files xtgs plogs   cold hot  ucpu cache  cold hot  ucpu cache
-----   ----  ----- ---- -----   ---- ---  ---- -----  ---- ---  ---- -----
tla      4MB    451   10 1,224    33s  2s  1.6s  23MB    5s  2s  1.9s  .4MB
emacs   77MB  2,138  391    66   104s  5s  3.8s 155MB   19s  3s  2.3s  13MB

[1] cold = disk cache flushed
    hot = source tree in disk cache
    ucpu = user cpu
    cache = increase in disk cache usage after first what-changed cmd
[2] files = number of source files according to `tla inventory -s'
    xtags = number of explicitly tagged files
    plogs = number of patch-logs (NOT included in `files')


tla (with inode-state):
   $ clear-disk-cache 500
   Touching 500MB of memory...done  
   $ /usr/bin/time tla help > /dev/null 2>&1
   $ cached_before=`disk_cache_usage`
   $ /usr/bin/time tla what-changed --diffs
   1.94user 0.43system 0:05.03elapsed 47%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (195major+1950minor)pagefaults 0swaps
   $ cached_after=`disk_cache_usage`
   $ nawk 'BEGIN { print "Cache increase: " '$cached_after' - '$cached_before' "MB" }'
   Cache increase: 0.4MB
   $ /usr/bin/time tla what-changed --diffs
   1.83user 0.40system 0:02.22elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (195major+1950minor)pagefaults 0swaps
   $ tla inventory -s | xargs du -s | nawk '{s+=$1};END{print s}'
   4980
   $ tla inventory -s | wc -l
       451
   $ tla inventory -s --tags |grep -c '	x_'
   10
   $ ls {arch}/,,inode-sigs/
   address@hidden
   address@hidden
   address@hidden

tla (NO inode-state):
   $ clear-disk-cache 500
   Touching 500MB of memory...done  
   $ /usr/bin/time tla help > /dev/null 2>&1
   $ cached_before=`disk_cache_usage`
   $ /usr/bin/time tla what-changed --diffs
   1.58user 0.75system 0:33.79elapsed 6%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (195major+1867minor)pagefaults 0swaps
   $ cached_after=`disk_cache_usage`
   $ nawk 'BEGIN { print "Cache increase: " '$cached_after' - '$cached_before' "MB" }'
   Cache increase: 23MB
   $ /usr/bin/time tla what-changed --diffs
   1.71user 0.53system 0:02.24elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (195major+1867minor)pagefaults 0swaps
   $ tla inventory -s | xargs du -s | nawk '{s+=$1};END{print s}'
   4980
   $ tla inventory -s | wc -l
       451
   $ tla inventory -s --tags |grep -c '	x_'
   10
   $ ls {arch}/,,inode-sigs/
   ls: {arch}/,,inode-sigs/: No such file or directory

emacs-lexbind (with inode-state):
   $ clear-disk-cache 500
   Touching 500MB of memory...done  
   $ /usr/bin/time tla help > /dev/null 2>&1
   $ cached_before=`disk_cache_usage`
   $ /usr/bin/time tla what-changed --diffs
   2.35user 0.86system 0:19.41elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (196major+1975minor)pagefaults 0swaps
   $ cached_after=`disk_cache_usage`
   $ nawk 'BEGIN { print "Cache increase: " '$cached_after' - '$cached_before' "MB" }'
   Cache increase: 13.4MB
   $ /usr/bin/time tla what-changed --diffs
   2.19user 0.59system 0:02.78elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (196major+1975minor)pagefaults 0swaps
   $ tla inventory -s | xargs du -s | nawk '{s+=$1};END{print s}'
   79604
   $ tla inventory -s | wc -l
      2138
   $ tla inventory -s --tags |grep -c '	x_'
   391
   $ ls {arch}/,,inode-sigs/
   address@hidden

emacs-lexbind (NO inode-state):
   $ clear-disk-cache 500
   Touching 500MB of memory...done  
   $ /usr/bin/time tla help > /dev/null 2>&1
   $ cached_before=`disk_cache_usage`
   $ /usr/bin/time tla what-changed --diffs
   3.91user 2.08system 1:44.34elapsed 5%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (196major+1864minor)pagefaults 0swaps
   $ cached_after=`disk_cache_usage`
   $ nawk 'BEGIN { print "Cache increase: " '$cached_after' - '$cached_before' "MB" }'
   Cache increase: 155.1MB
   $ /usr/bin/time tla what-changed --diffs
   3.74user 1.51system 0:05.25elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
   0inputs+0outputs (196major+1864minor)pagefaults 0swaps
   $ tla inventory -s | xargs du -s | nawk '{s+=$1};END{print s}'
   79604
   $ tla inventory -s | wc -l
      2138
   $ tla inventory -s --tags |grep -c '	x_'
   391
   $ ls {arch}/,,inode-sigs/
   ls: {arch}/,,inode-sigs/: No such file or directory