[mythtv] Significant mythfrontend load difference 19 vs. 18.1 about 50%

[belcampo]

Same configuration, build one after another. Crashing frontend looks like to 
be almost an exclusive issue on BBC Astra 28.2E. Switching to BBC 1 often 
causes segfaulting the frontend
Version 0.18.1
16780 mythtv    15   0  157m  61m  34m S 30.5 28.2   6:17.45 mythfrontend       
16597 root      15   0  152m  14m 9984 S  2.6  6.8   0:27.65 mythbackend        
 3100 root      16   0 88080  35m  20m R  1.3 16.3  19:24.20 X                  
16823 mythtv    15   0  112m  42m  20m S  1.3 19.4   0:41.29 mozilla-firefox    
 3516 mythtv    15   0  6744 2552 1712 S  0.3  1.1   0:08.09 wmaker             
16942 mythtv    16   0  1996 1020  788 R  0.3  0.5   0:00.05 top                
    1 root      16   0  1564  420  396 S  0.0  0.2   0:00.58 init               
    2 root      34  19     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0        
    3 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 watchdog/0         
    4 root      10  -5     0    0    0 S  0.0  0.0   0:00.21 events/0           
    5 root      10  -5     0    0    0 S  0.0  0.0   0:00.01 khelper            
    6 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kthread            
    8 root      10  -5     0    0    0 S  0.0  0.0   0:00.28 kblockd/0          
    9 root      20  -5     0    0    0 S  0.0  0.0   0:00.00 kacpid             
  119 root      15   0     0    0    0 S  0.0  0.0   0:01.18 pdflush            
  120 root      15   0     0    0    0 S  0.0  0.0   0:01.10 pdflush            
Version 0.19
25106 mythtv    15   0  148m  56m  34m S 53.3 26.1   2:44.35 mythfrontend       
(never under 40 sometimes above 65)
25054 root      16   0  231m  28m  10m S  3.0 13.2   0:16.19 mythbackend        
16823 mythtv    15   0  112m  36m  17m S  1.7 16.6   0:51.78 mozilla-firefox    
 3100 root      15   0 86492  29m  20m S  1.3 13.5  19:45.00 X                  
 2952 mysql     16   0 95412 5352 1968 S  0.7  2.4   1:45.04 mysqld             
16942 mythtv    16   0  1996  956  788 R  0.3  0.4   0:02.86 top                
    1 root      16   0  1564  420  396 S  0.0  0.2   0:00.58 init               
    2 root      34  19     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0        
    3 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 watchdog/0         
    4 root      10  -5     0    0    0 S  0.0  0.0   0:00.23 events/0           
    5 root      10  -5     0    0    0 S  0.0  0.0   0:00.01 khelper            
    6 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kthread            
    8 root      10  -5     0    0    0 S  0.0  0.0   0:00.32 kblockd/0