RE: [Boost-users] Changing the heap allocator

Hi Victor, Your first run took 1/4 sec and the second run took 21 sec. These are similar to the times I get. If you play around with the settings you can get the Microsoft allocator down to below 1kHz, which is laughable. On my Pentium IV @ 2GHz machine, Doug Lea's allocator consistently runs at about 1.3 MHz! Any program which is bounded by the allocator will benefit by replacing with a decent one. Even when I don't get the pathological behaviour I usually get (at least) 2 to 3 times speed up. An STL set uses a red-black tree and is a good candidate because it is heap intensive. Eg copying a set<int> with 1024 entries increases from 950 Hz to 2.5 kHz. Inserting these elements into the set increases from 390 kHz to 1.4 MHz. Has anyone out there tried to replace the heap allocator for an application using boost under Windows? - David

-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Victor Snezhko Sent: Monday, 12 April 2004 12:46 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] Changing the heap allocator

Hello, Victor! You wrote to on Sat, 10 Apr 2004 01:16:30 -0700:

VAW> re: (because of msvcp60.dll) VAW> that may sum up the entire problem.... VC++6.0 is VAW> broken...period...simple statement of fact VAW> it was replaced 2 years ago by .net then again by .net2003 VAW> you may wish to test with a current version

The same behaviour with VC .NET 2003:

[d:/temp/temp/temp]$ make all cl /O2 /GX temp.cpp /Fetemp-vc71.exe Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for 80x86 [...] /out:temp-vc71.exe

[d:/temp/temp/temp]$ ./temp-vc71.exe Time = 240 ms Rate = 333333 Hz Time = 21212 ms Rate = 3771 Hz Time = 641 ms Rate = 124804 Hz Time = 18768 ms Rate = 4262 Hz Time = 150 ms Rate = 533333 Hz

-- With best regards, Victor Snezhko. E-mail: snezhko@indorsoft.ru

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