Performance/Reorder Symbols For Libraries

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

Visual C++ Compiler Options
 
/Gh (Enable _penter Hook Function)
/Gy (Enable Function-Level Linking)