Improved compartmentalization of filter tool's optimizations

Improved compartmentalization of filter tool's optimizations and added additional optimization.

Here are the stats on the optimization distribution:

Executing desk_espn.skp                             1: 1
Executing desk_gmailthread.skp              0: 13   1: 1
Executing desk_googleplus.skp                       1: 8
Executing desk_googlespreadsheet.skp                1: 16
Executing desk_googlespreadsheetdashed.skp          1: 16
Executing desk_gws.skp                      0: 2
Executing desk_sfgate.skp                   0: 3
Executing desk_twitter.skp                          1: 3
Executing desk_wowwiki.skp                  0: 3    1: 3
Executing desk_yahoosports.skp                      1: 1
Executing desk_youtube.skp                          1: 1
Executing tabl_culturalsolutions.skp        0: 1    1: 1
Executing tabl_engadget.skp                         1: 5
Executing tabl_googlecalendar.skp           0: 4
Executing tabl_hsfi.skp                     0: 3
Executing tabl_onlinewsj.skp                0: 12
Executing tabl_theverge.skp                         1: 1
Executing tabl_ukwsj.skp                    0: 12

totals                                      0: 53   1: 57

Here are the performance changes (old is on left, new is on right - I ran the gpu numbers twice to factor out noise):

*           desk_yahooanswers.skp gpu c    43.26      44.22      -0.96    -2.2%
*             desk_googleplus.skp gpu c   247.28     251.05      -3.77    -1.5%
*                   tabl_hsfi.skp gpu c   101.74     102.48      -0.74    -0.7%
*                desk_wowwiki.skp gpu c   203.08     203.58      -0.50    -0.2%
*                   desk_espn.skp gpu c    17.25      17.26      -0.01    -0.1%
*                 desk_sfgate.skp gpu c    42.40      42.37      +0.03    +0.1%
*                    desk_gws.skp gpu c    11.02      11.01      +0.01    +0.1%
*         tabl_googlecalendar.skp gpu c    40.43      40.37      +0.06    +0.1%
*                desk_twitter.skp gpu c   168.40     168.14      +0.26    +0.2%
*      tabl_culturalsolutions.skp gpu c    69.56      69.00      +0.56    +0.8%
*               tabl_theverge.skp gpu c   251.82     247.70      +4.12    +1.6%
*            desk_gmailthread.skp gpu c    27.97      27.49      +0.48    +1.7%
*                desk_youtube.skp gpu c    47.80      46.63      +1.17    +2.4%
*               tabl_engadget.skp gpu c   174.55     169.60      +4.95    +2.8%

*                  tabl_ukwsj.skp gpu c    64.11      60.03      +4.08    +6.4%
*              tabl_onlinewsj.skp gpu c    71.81      67.20      +4.61    +6.4%
*desk_googlespreadsheetdashed.skp gpu c    82.15      73.98      +8.17    +9.9%
*      desk_googlespreadsheet.skp gpu c    26.02      19.87      +6.15   +23.6%




*               tabl_theverge.skp gpu c   246.93     252.33      -5.40    -2.2%
*                desk_twitter.skp gpu c   166.99     169.90      -2.91    -1.7%
*            desk_yahoosports.skp gpu c    71.82      72.48      -0.66    -0.9%
*         tabl_googlecalendar.skp gpu c    40.14      40.41      -0.27    -0.7%
*               tabl_engadget.skp gpu c   166.92     167.44      -0.52    -0.3%
*                desk_youtube.skp gpu c    45.85      45.99      -0.14    -0.3%
*                    desk_gws.skp gpu c    10.95      10.96      -0.01    -0.1%
*                   tabl_hsfi.skp gpu c   100.98     100.97      +0.01    +0.0%
*      tabl_culturalsolutions.skp gpu c    68.69      68.19      +0.50    +0.7%
*             desk_googleplus.skp gpu c   254.95     251.53      +3.42    +1.3%
*                desk_wowwiki.skp gpu c   204.17     200.87      +3.30    +1.6%
*                 desk_sfgate.skp gpu c    42.67      41.24      +1.43    +3.4%
*                   desk_espn.skp gpu c    17.53      16.88      +0.65    +3.7%
*            desk_gmailthread.skp gpu c    28.82      27.74      +1.08    +3.7%

*                  tabl_ukwsj.skp gpu c    63.75      60.22      +3.53    +5.5%
*              tabl_onlinewsj.skp gpu c    71.41      67.01      +4.40    +6.2%
*desk_googlespreadsheetdashed.skp gpu c    81.94      73.99      +7.95    +9.7%
*      desk_googlespreadsheet.skp gpu c    26.39      19.94      +6.45   +24.4%




*                    desk_gws.skp  c     4.63       4.72      -0.09    -1.9%
*                  tabl_ukwsj.skp  c    31.19      31.43      -0.24    -0.8%
*                 desk_sfgate.skp  c    22.59      22.75      -0.16    -0.7%
*               tabl_theverge.skp  c   180.74     180.57      +0.17    +0.1%
*                   tabl_hsfi.skp  c    75.61      75.52      +0.09    +0.1%
*                desk_wowwiki.skp  c   176.78     176.41      +0.37    +0.2%
*         tabl_googlecalendar.skp  c     4.21       4.20      +0.01    +0.2%
*            desk_yahoosports.skp  c    30.95      30.86      +0.09    +0.3%
*               tabl_engadget.skp  c    94.71      94.34      +0.37    +0.4%
*                desk_twitter.skp  c    60.72      60.25      +0.47    +0.8%
*             desk_googleplus.skp  c    57.64      57.13      +0.51    +0.9%
*                desk_youtube.skp  c    13.50      13.38      +0.12    +0.9%
*            desk_gmailthread.skp  c     4.48       4.44      +0.04    +0.9%
*      tabl_culturalsolutions.skp  c    65.57      64.77      +0.80    +1.2%
*              tabl_onlinewsj.skp  c    35.23      34.73      +0.50    +1.4%
*                   desk_espn.skp  c    15.46      15.14      +0.32    +2.1%
*desk_googlespreadsheetdashed.skp  c    18.93      17.40      +1.53    +8.1%
*      desk_googlespreadsheet.skp  c     5.77       4.62      +1.15   +19.9%

As one would expect only the desk_gmailthread, tabl_ukwsj, tabl_onlinewsj, desk_googlespreadsheetdashed and desk_googlespreadsheet skps show consistent wins. The cpu isn't impacted all that much although the gpu does show some real improvments.

[DerekS, 2013-02-05 20:43:09]

lgtm

[robertphillips, 2013-02-05 20:52:11]

committed as r7601