Difference between revisions of "Performance/Reorder Symbols For Libraries"
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== Microsoft Visual Studio 2008 == | == Microsoft Visual Studio 2008 == | ||
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| + | OpenOffice.org uses the Microsoft Visual Studion 2008 C/C++ compiler suite for building (called wntmsci12[.pro]). What options are available to support us reordering code/data in libraries. If you start the C/C++ compiler with the help option | ||
<source lang="text"> | <source lang="text"> | ||
| − | + | cl.exe /? | |
| + | </source> | ||
| + | |||
| + | you can see all supported options. | ||
| + | |||
| + | <source lang="text"> | ||
| + | Microsoft (R) 32-Bit C/C++-Optimierungscompiler Version 15.00.30729.01 für 80x86 | ||
| + | |||
| + | Copyright (C) Microsoft Corporation. All rights reserved. | ||
| + | ... | ||
/Gh (Enable _penter Hook Function) | /Gh (Enable _penter Hook Function) | ||
/Gy (Enable Function-Level Linking) | /Gy (Enable Function-Level Linking) | ||
| + | ... | ||
</source> | </source> | ||
Revision as of 20:57, 21 March 2009
Reorder code/data for libraries to improve file I/O
The comprehensive analysis of the cold start up behavior of OpenOffice.org shows that file I/O is main bottleneck. About 80% of the start up time is spent waiting for data from the disk. Most file I/O depends on library loading. This part describes what can be done to reduce I/O time for loading OpenOffice.org libraries. The main ideas are system independent but the solutions must be system/compiler specific. The following chapters describe in detail how we want to reorder code/data within the libraries.
Windows
This chapter describes the solution for the Windows platform.
Microsoft Visual Studio 2008
OpenOffice.org uses the Microsoft Visual Studion 2008 C/C++ compiler suite for building (called wntmsci12[.pro]). What options are available to support us reordering code/data in libraries. If you start the C/C++ compiler with the help option
cl.exe /?
you can see all supported options.
Microsoft (R) 32-Bit C/C++-Optimierungscompiler Version 15.00.30729.01 für 80x86 Copyright (C) Microsoft Corporation. All rights reserved. ... /Gh (Enable _penter Hook Function) /Gy (Enable Function-Level Linking) ...
