memory - strange slowing down of C++ allocs -

could please tell me why following things happen:

i have 2 computers:

1. my working comp
2. server

i maintain c++ program (msvc 2005 c++ compiled) works slow on server, not on comp.

i conducted measurements (getthreadtimes , on) , narrow place - memory allocation (new/malloc). , happens on server!

i claim happens due memory fragmentation because of 1st time server instance of program works fine, start loosing time on allocs after data reload again memory (1-1.5 million allocs/frees).

i wouldnt surprised if see same behaviour due memory fragmentation on both computers (my comp , server) see is: 1). on comp allocations take ~5% of time (not exact someting that) 2). on server these allocs takes ~75% of time

how happen? slow down c++ allocations on server computer, meanwhile ok workstation. difference? connected os-level memory management functions? because c++ level manager same in both cases.

here both configurations:

1). computer (where allocs take ~5%):

os name:                   microsoft windows 7 enterprise  os version:                6.1.7600 n/a build 7600 os manufacturer:           microsoft corporation os configuration:          member workstation os build type:             multiprocessor free registered owner:          windows user original install date:     16/09/2011, 19:37:43 system boot time:          05/04/2013, 11:58:11 system model:              7304a58 system type:               x64-based pc processor(s):              1 processor(s) installed.                            [01]: intel64 family 6 model 23 stepping 10 genuineintel ~2642 mhz windows directory:         c:\windows system directory:          c:\windows\system32 boot device:               \device\harddiskvolume2 system locale:             ru;russian input locale:              en-us;english (united states) total physical memory:     4,061 mb available physical memory: 872 mb virtual memory: max size:  8,121 mb virtual memory: available: 4,579 mb virtual memory: in use:    3,542 mb page file location(s):     c:\pagefile.sys 

2). server (where allocs take ~75%):

os name:                   microsoft(r) windows(r) server 2003, enterprise edition os version:                5.2.3790 service pack 2 build 3790 os manufacturer:           microsoft corporation os configuration:          member server os build type:             multiprocessor free original install date:     11/12/2008, 01:22:57 system time:            1 days, 8 hours, 35 minutes, 52 seconds system manufacturer:       hp system model:              proliant bl685c g5   system type:               x86-based pc processor(s):              4 processor(s) installed.                            [01]: x86 family 16 model 2 stepping 3 authenticamd ~2210 mhz                            [02]: x86 family 16 model 2 stepping 3 authenticamd ~2210 mhz                            [03]: x86 family 16 model 2 stepping 3 authenticamd ~2210 mhz                            [04]: x86 family 16 model 2 stepping 3 authenticamd ~2210 mhz windows directory:         c:\winnt system directory:          c:\winnt\system32 boot device:               \device\harddiskvolume1 total physical memory:     65,534 mb available physical memory: 61,284 mb page file: max size:       97,696 mb page file: available:      93,445 mb page file: in use:         4,251 mb page file location(s):     c:\pagefile.sys                            d:\pagefile1\pagefile.sys                            d:\pagefile2\pagefile.sys                            d:\pagefile3\pagefile.sys                            d:\pagefile4\pagefile.sys                            d:\pagefile5\pagefile.sys                            d:\pagefile6\pagefile.sys                            d:\pagefile7\pagefile.sys 

will grateful clarifying issue.

the problem memory functions use 1 mutex lock memory allocation , freeing.