Difference between revisions of "Performance/Library and directory structure"
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=Optimizing the placement of libraries for a better cold start up= | =Optimizing the placement of libraries for a better cold start up= | ||
| − | This part wants to concentrate on | + | This part wants to concentrate on a possible problem which has been introduced by the three layer structure for OpenOffice.org 3. |
== Main idea == | == Main idea == | ||
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flat = All libraries are located next to the application binaries. Means that all libraries are within the "OpenOffice.org 3\program" folder. | flat = All libraries are located next to the application binaries. Means that all libraries are within the "OpenOffice.org 3\program" folder. | ||
| + | |||
| + | The performance test clearly shows that the split of the libraries and not placing them next to the application binaries brought us a 10% start up performance penalty. | ||
Revision as of 13:34, 14 April 2009
Contents
Optimizing the placement of libraries for a better cold start up
This part wants to concentrate on a possible problem which has been introduced by the three layer structure for OpenOffice.org 3.
Main idea
According to an article from Microsoft the placement of shared libraries is crucial for a good start up performance. The article states that the load time of a library can be reduced by about 20% if it's located at the first search position (next to the binary).
It must be clarified if the findings can also have positive effects on the other platforms.
Windows
- Windows Vista Ultimate 32-Bit
- Opteron 175 (Dual core) 2,2Ghz
- 4 GB RAM
- Deskstar 7K250 160GB 8MB Cache
- (Super Fetch and Prefetch disabled)
Performance test with DEV300m45
The following performance test wants to clarify how much performance can be gained with an optimized library placement.
| Optimization method | Test run 1 | Test run 2 | Test run 3 | Test run 4 | Test run 5 | Mean time |
|---|---|---|---|---|---|---|
| OOO310m9 | 16,1s | 16,1s | 16,4s | 16,2s | 16,2s | 16,2s (100%) |
| DEV300m45 (standard) | 15,8s | 15,8s | 14,9s | 15,9s | 14,8s | 15,4s (95%) |
| DEV300m45 (flat*) | 13,7s | 14,1s | 14,3s | 13,7s | 13,3s | 13,8s (85%) |
| DEV300m45 (not rebased/flat*) | 9,9s | 11,5s | 11,3s | 11,6s | 10,7s | 11s (68%) |
flat = All libraries are located next to the application binaries. Means that all libraries are within the "OpenOffice.org 3\program" folder.
The performance test clearly shows that the split of the libraries and not placing them next to the application binaries brought us a 10% start up performance penalty.
