| In Win32, DLL's are "pre-linked" using a specified base address. | 
 | When the DLL is loaded, an attempt is made to place it at | 
 | that address.  If that address is already in use, a new base address | 
 | is selected, and the DLL subject to fixups.  Apparently, these | 
 | fixups are very slow, and significant performance gains can be | 
 | made by selecting a good base address. | 
 |  | 
 | This document is to allocate base addresses to core Python | 
 | and Python .PYD files, to give a better change of optimal performance. | 
 | This base address is passed to the linker using the /BASE | 
 | command line switch. | 
 |  | 
 |  | 
 | Python.exe/Pythonw.exe     - 1d000000 - 1e000000 (-1) | 
 | Python.dll                 - 1e000000 - 1e100000 (-1) | 
 |  | 
 | Standard Extension Modules 1e100000 - 1e200000  "" | 
 |  - _symtable                 1e100000 - 1e110000 | 
 |  - bsddb                     1e180000 - 1e188000  "" | 
 |  - _tkinter                  1e190000 - 1e1A0000 | 
 |  - parser                    1e1A0000 - 1e1B0000 | 
 |  - zlib                      1e1B0000 - 1e1C0000 | 
 |  - winreg                    1e1C0000 - 1e1D0000 | 
 |  - _socket                   1e1D0000 - 1e1E0000 | 
 |  - _sre                      1e1E0000 - 1e1F0000 | 
 |  - mmap                      1e1F0000 - 1e1FFFFF | 
 |  | 
 | More standard extensions 1D100000 - 1e000000 | 
 |  - pyexpat                   1D100000 - 1D110000 | 
 |  - select                    1D110000 - 1D120000 | 
 |  - unicodedata               1D120000 - 1D160000 | 
 |  - winsound                  1D160000 - 1D170000 | 
 |  - bZ2                       1D170000 - 1D180000 | 
 |  - datetime                  1D180000 - 1D190000 | 
 |  | 
 | Other extension modules | 
 |  - win32api                  1e200000 - 1e220000 | 
 |  - win32ras                  1e220000 - 1e230000 | 
 |  - win32lz                   1e230000 - 1e240000 | 
 |  - timer                     1e240000 - 1e250000 | 
 |  - mmapfile                  1e250000 - 1e260000 | 
 |  - win32pipe                 1e260000 - 1e270000 | 
 |  - avl                       1e270000 - 1e270000 | 
 |  - dbhash                    1e280000 - 1e290000 | 
 |  - win32net                  1e290000 - 1e2A0000 | 
 |  - win32security             1e2A0000 - 1e2B0000 | 
 |  - win32print                1e2B0000 - 1e2c0000 | 
 |  - <unused>                  1e2d0000 - 1e2e0000 | 
 |  - win32gui                  1e2e0000 - 1e2f0000 | 
 |  - _imaging                  1e2f0000 - 1e300000 | 
 |  - multiarray                1e300000 - 1e310000 | 
 |  - win32help                 1e310000 - 1e320000 | 
 |  - win32clipboard            1e320000 - 1e330000 | 
 |  - win2kras                  1e330000 - 1e340000 | 
 |  - pythoncom                 1e340000 - 1e400000 | 
 |  - win32ui                   1e400000 - 1e500000 | 
 |  - win32uiole                1e500000 - 1e600000 | 
 |  - pywintypes                1e600000 - 1e700000 | 
 |  - win32process              1e700000 - 1e800000 | 
 |  - odbc                      1e710000 - 1e720000 | 
 |  - dbi                       1e720000 - 1e730000 | 
 |  - win32file                 1e730000 - 1e740000 | 
 |  - win32wnet                 1e740000 - 1e750000 | 
 |  - win32com.shell            1e750000 - 1e760000 | 
 |  - win32com.internet         1e760000 - 1e770000 | 
 |  - win32com.exchange         1e770000 - 1e780000 | 
 |  - win32com.exchdapi         1e780000 - 1e790000 | 
 |  - win32com.axscript         1e790000 - 1e7a0000 | 
 |  - win32com.axdebug          1e7b0000 - 1e7c0000 | 
 |  - win32com.adsi             1e7f0000 - 1e800000 | 
 |  - win32event                1e810000 - 1e820000 | 
 |  - win32evtlog               1e820000 - 1e830000 | 
 |  - win32com.axcontrol        1e830000 - 1e840000 | 
 |  | 
 |  |