Memory use analysis done by Conrad Carlen (ccarlen@netscape.com).
Operating system == Mac OSX 10.1
All bits are optimized.

Key:
RPRVT - amount of resident memory consumed by our heap allocations
RSHRD - amount of resident shared memory (shared libraries)
RSIZE - ~equals RPRVT + RSHRD
VSIZE - the total amount of memory consumed by the process (resident and paged mem combined)


PPEmbed with all components

On launch with mozilla.org
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  555 PPEmbed     61.7%  0:10.17   6    78   179  9.04M  17.7M  21.0M+ 80.5M 

After cnn.com, netscape.com, apple.com
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  555 PPEmbed     77.0%  0:52.48   6    79   246  17.5M  22.9M  32.4M  96.7M 

After 6 sites on http://komodo.mozilla.org/buster
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  555 PPEmbed     68.4%  2:51.75   6    80   259  18.8M- 23.3M  33.6M- 97.8M-


PPEmbed with smaller component list

./accessibleDebug.shlb
./AppShellDebug.shlb
./CacheDebug.shlb
./CapsDebug.shlb
./chardetDebug.shlb
./ChomeRegistryDebug.shlb
./contentDebug.shlb
./CookieDebug.shlb
./docshellDebug.shlb
./domDebug.shlb
./EditorCoreDebug.shlb
./EditorTxmgrDebug.shlb
./EmbedComponentsDebug.shlb
./gfx2Debug.shlb
./gifdecoder2Debug.shlb
./htmlparserDebug.shlb
./icondecoderDebug.shlb
./jpegdecoder2Debug.shlb
./JSLoaderDebug.shlb
./JSUrlDebug.shlb
./layoutDebug.shlb
./libimg2Debug.shlb
./libjarDebug.shlb
./libprefDebug.shlb
./lwbrkDebug.shlb
./mozBrowserDebug.shlb
./Necko2Debug.shlb
./NeckoDebug.shlb
./nslocaleDebug.shlb
./ojiDebug.shlb
./PIPNSSDebug.shlb
./PIPPKIDebug.shlb
./pluginDebug.shlb
./pngdecoder2Debug.shlb
./profileDebug.shlb
./RDFLibraryDebug.shlb
./shistoryDebug.shlb
./strresDebug.shlb
./TextServicesDebug.shlb
./uconvDebug.shlb
./ucvcnDebug.shlb
./ucvibmDebug.shlb
./ucvjaDebug.shlb
./ucvkoDebug.shlb
./ucvlatinDebug.shlb
./ucvtw2Debug.shlb
./ucvtwDebug.shlb
./unicharutilDebug.shlb
./uriLoaderDebug.shlb
./viewDebug.shlb
./WalletDebug.shlb
./webBrowserDebug.shlb
./xferDebug.shlb
./xmlextrasDebug.shlb
./XPConnectDebug.shlb

On launch with mozilla.org
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  557 PPEmbed     75.8%  0:09.06   5    75   174  8.78M  17.2M  20.1M  79.3M 

After cnn.com, netscape.com, apple.com
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  557 PPEmbed     82.6%  0:43.01   6    79   247  17.3M  18.8M  29.8M  90.3M 

After 6 sites on http://komodo.mozilla.org/buster
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  557 PPEmbed     79.2%  2:23.77   6    79   237  15.6M  18.4M  28.0M  87.6M 



PPEmbed with yet smaller component list

./CacheDebug.shlb
./CapsDebug.shlb
./chardetDebug.shlb
./ChomeRegistryDebug.shlb
./contentDebug.shlb
./docshellDebug.shlb
./domDebug.shlb
./EditorCoreDebug.shlb
./EmbedComponentsDebug.shlb
./gfx2Debug.shlb
./gifdecoder2Debug.shlb
./htmlparserDebug.shlb
./jpegdecoder2Debug.shlb
./JSLoaderDebug.shlb
./JSUrlDebug.shlb
./layoutDebug.shlb
./libimg2Debug.shlb
./libjarDebug.shlb
./libprefDebug.shlb
./lwbrkDebug.shlb
./Necko2Debug.shlb
./NeckoDebug.shlb
./nslocaleDebug.shlb
./pluginDebug.shlb
./pngdecoder2Debug.shlb
./profileDebug.shlb
./RDFLibraryDebug.shlb
./shistoryDebug.shlb
./strresDebug.shlb
./TextServicesDebug.shlb
./uconvDebug.shlb
./ucvcnDebug.shlb
./ucvibmDebug.shlb
./ucvjaDebug.shlb
./ucvkoDebug.shlb
./ucvlatinDebug.shlb
./ucvtw2Debug.shlb
./ucvtwDebug.shlb
./unicharutilDebug.shlb
./uriLoaderDebug.shlb
./viewDebug.shlb
./webBrowserDebug.shlb
./XPConnectDebug.shlb

On launch with mozilla.org
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  559 PPEmbed     81.9%  1:15.54   5    75   151  6.93M  15.0M  17.4M  75.1M 

After cnn.com, netscape.com, apple.com
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  560 PPEmbed     42.9%  0:19.47   6    79   229  14.1M  17.5M  25.9M  85.6M 

After 6 sites on http://komodo.mozilla.org/buster
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  560 PPEmbed     42.1%  1:15.40   6    79   241  15.3M  19.7M  27.7M  89.7M 


Mozilla Opt

On launch with mozilla.org
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  551 Mozilla      0.8%  0:13.09   6    79   222  18.7M  22.2M  35.6M  98.1M 

After cnn.com, netscape.com, apple.com
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  551 Mozilla      1.7%  0:46.13   6    80   285  25.9M  23.2M  43.6M   107M 

After 6 sites on http://komodo.mozilla.org/buster
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  551 Mozilla     33.0%  1:35.86   6    80   322  29.2M+ 23.7M  47.6M+  111M+


IE 5.1

On launch with mozilla.org
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  479 Internet E   0.0%  0:02.94   8    95   111  4.30M  14.5M  14.1M  73.0M 

After cnn.com, netscape.com, apple.com
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  479 Internet E   1.7%  0:16.01   8    95   162  11.1M  15.2M  21.4M  89.2M 

After 6 sites on http://komodo.mozilla.org/buster
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE 
  479 Internet E   2.6%  0:40.05   8    96   191  14.2M  17.0M  26.2M  95.4M