Databases
StackOverflow2013
Postsdbo
PONo speedup with precompiled headers on gcc (but large speedup with visual studio)
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONo speedup with precompiled headers on gcc (but large speedup with visual studio)
    primarykey
    data
    text
    <p>I'm working on a large project that must builds under multiple environment, chiefly linux/gcc and windows/msvc. To speed up the build, we use precompiled headers.</p> <p>The Windows implementation is very efficient: on my quad-core hyperthreaded i7 build time goes down from 9 minutes to 1.5 minutes. However using precompiled headers doesn't seem to improve performance: in both cases it builds in 22 minutes under a virtual box on the same computer, or about 40 minutes on a real server.</p> <p>So I'm thinking the obvious, that I somehow got something wrong and that the precompiled header isn't kicking in. I can't find what however.</p> <p>Our Makefiles are generated by CMake, so I can copy paste the code used to compile the header and the object files that uses them.</p> <p>Creating the header:</p> <pre><code>/usr/bin/c++ -O3 -DNDEBUG --no-warnings "-I/mnt/code/server a/src/game" "-I/mnt/code/server a/src/game/vmap" "-I/mnt/code/server a/dep/include/g3dlite" "-I/mnt/code/server a/dep/include" "-I/mnt/code/server a/src/shared" "-I/mnt/code/server a/src/framework" "-I/mnt/code/server a/buildlinux" "-I/mnt/code/server a/buildlinux/src/shared" -I/usr/include/mysql "-I/mnt/code/server a/dep/acelite" -DDO_MYSQL -DHAVE_CONFIG_H -DVERSION=\"0.6.1\" -DSYSCONFDIR=\"../etc/\" -D_RELEASE -D_NDEBUG -x c++-header -o "/mnt/code/server a/buildlinux/src/game/pchdef.h.gch" "/mnt/code/server a/src/game/pchdef.h" </code></pre> <p>Compiling an object file:</p> <pre><code>/usr/bin/c++ $(CXX_DEFINES) $(CXX_FLAGS) "-I/mnt/code/server a/buildlinux/src/game" -include pchdef.h -Winvalid-pch -o CMakeFiles/game.dir/AccountMgr.cpp.o -c "/mnt/code/server a/src/game/AccountMgr.cpp" </code></pre> <p>Insights are appreciated, even if they don't directly derive from the snippets above.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USNorswap
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. PONo speedup with precompiled headers on gcc (but large speedup with visual studio)
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PONo speedup with precompiled headers on gcc (but large speedup with visual studio)
      1. USlfxgroove
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload