[mythtv-commits] Ticket #3506: Reduce memory usage by not duplicating button images in memory

[MythTV]

#3506: Reduce memory usage by not duplicating button images in memory
-------------------------+--------------------------------------------------
 Reporter:  stuartm      |       Owner:  ijr 
     Type:  enhancement  |      Status:  new 
 Priority:  major        |   Milestone:  0.21
Component:  mythtv       |     Version:  head
 Severity:  medium       |  
-------------------------+--------------------------------------------------
 The attached 'proof of concept' patch significantly reduces memory usage
 of mythfrontend with some themes by not loading the same watermarks and
 icons into memory multiple times. Right now if two menu entries share the
 same watermark or icon, then that image is loaded each time. The patch
 instead maintains a list of loaded images and pointers allowing a single
 image in memory to be shared.

 Another benefit should be that startup is marginally faster because we no
 longer go back to the disk each time.

 Example memory savings with blootube-wide (mileage my vary)
 {{{
 Normal - Without Patch
 ----------------------
 VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 593m 302m  33m S  0.0 30.1   0:52.66 mythfrontend

 With Patch
 ----------
 VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 435m 143m  33m S  0.0 14.3   0:04.54 mythfrontend
 }}}

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Ticket URL: <http://svn.mythtv.org/trac/ticket/3506>
MythTV <http://svn.mythtv.org/trac>
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