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msvc v7.1 to v9 performance issues

8 New Member
I have migrated a c++ project from msvc 7.1 using boost 1.32 to msvc 9 using boost 1.38.

I have however noticed that the binary compiled under msvc 9 is almost 25% slower than the one compiled under msvc 7.1

The migration wizard in Visual Studio .NET 2008 did the needful, so i have not manually changed any project settings.

Any suggestions or tweaks will be really helpful.

Thanks in advance!
Apr 21 '09 #1
3 1569
weaknessforcats
9,208 Recognized Expert Moderator Expert
Is this slowdown for a debug or release build?

Windows program? Set for lean and mean?

If it's debug, the current debugger is much niftier than the older one. That could translate into a slowdown.
Apr 21 '09 #2
ameyav
8 New Member
This is for release build.

The "/O2" compiler option was turned on in both the compiler versions[in bold], but the performance difference still persists.
Apr 22 '09 #3
weaknessforcats
9,208 Recognized Expert Moderator Expert
Have you tried using Boost 1.32 with VC9? Maybe the problem is in the Boost library.
Apr 23 '09 #4

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