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In Win32, DLL's are "pre-linked" using a specified base address.
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When the DLL is loaded, an attempt is made to place it at
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that address. If that address is already in use, a new base address
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is selected, and the DLL subject to fixups. Apparently, these
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fixups are very slow, and significant performance gains can be
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made by selecting a good base address.
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This document is to allocate base addresses to core Python
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and Python .PYD files, to give a better change of optimal performance.
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This base address is passed to the linker using the /BASE
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command line switch.
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Python.exe/Pythonw.exe - 1d000000 - 1e000000 (-1)
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Python.dll - 1e000000 - 1e100000 (-1)
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Standard Extension Modules 1e100000 - 1e200000 ""
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- _symtable 1e100000 - 1e110000
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- bsddb 1e180000 - 1e188000 ""
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- _tkinter 1e190000 - 1e1A0000
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- parser 1e1A0000 - 1e1B0000
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- zlib 1e1B0000 - 1e1C0000
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- winreg 1e1C0000 - 1e1D0000
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- _socket 1e1D0000 - 1e1E0000
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- _sre 1e1E0000 - 1e1F0000
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- mmap 1e1F0000 - 1e1FFFFF
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More standard extensions 1D100000 - 1e000000
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- pyexpat 1D100000 - 1D110000
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- select 1D110000 - 1D120000
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- unicodedata 1D120000 - 1D160000
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- winsound 1D160000 - 1D170000
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- bZ2 1D170000 - 1D180000
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- datetime 1D180000 - 1D190000
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- _csv 1D190000 - 1D1A0000
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Other extension modules
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- win32api 1e200000 - 1e220000
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- win32ras 1e220000 - 1e230000
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- win32lz 1e230000 - 1e240000
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- timer 1e240000 - 1e250000
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- mmapfile 1e250000 - 1e260000
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- win32pipe 1e260000 - 1e270000
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- avl 1e270000 - 1e270000
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- dbhash 1e280000 - 1e290000
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- win32net 1e290000 - 1e2A0000
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- win32security 1e2A0000 - 1e2B0000
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- win32print 1e2B0000 - 1e2c0000
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- <unused> 1e2d0000 - 1e2e0000
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- win32gui 1e2e0000 - 1e2f0000
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- _imaging 1e2f0000 - 1e300000
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- multiarray 1e300000 - 1e310000
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- win32help 1e310000 - 1e320000
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- win32clipboard 1e320000 - 1e330000
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- win2kras 1e330000 - 1e340000
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- pythoncom 1e340000 - 1e400000
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- win32ui 1e400000 - 1e500000
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- win32uiole 1e500000 - 1e600000
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- pywintypes 1e600000 - 1e700000
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- win32process 1e700000 - 1e800000
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- odbc 1e710000 - 1e720000
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- dbi 1e720000 - 1e730000
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- win32file 1e730000 - 1e740000
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- win32wnet 1e740000 - 1e750000
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- win32com.shell 1e750000 - 1e760000
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- win32com.internet 1e760000 - 1e770000
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- win32com.exchange 1e770000 - 1e780000
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- win32com.exchdapi 1e780000 - 1e790000
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- win32com.axscript 1e790000 - 1e7a0000
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- win32com.axdebug 1e7b0000 - 1e7c0000
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- win32com.adsi 1e7f0000 - 1e800000
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- win32event 1e810000 - 1e820000
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- win32evtlog 1e820000 - 1e830000
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- win32com.axcontrol 1e830000 - 1e840000
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