There is big question how work 32-bit programs on 64-bit OS.
When 64-bit 1st time reach ordinary computers world with 64-bit XP then I made
a big testing on the same hardware. And not so bad as were 16-bit progs on 32-bit OS,
still in most cases 32-bit things ran 10-25% slower on 64-bit than on 32-bit OS.
Now time is gone and I remade such a testing again, this time on Windows 7.
Both 32-bit & 64-bit versions were W7 Ultimate, Build 7229.
Most tests were still 32-bit ones but there was already 7 native 64-bit things.
Test rig configuration was one average one (I don't reinstall many times my own puter):
CPU: Intel Core 2 Duo E8400 3 GHz 6 MB L2 cache
Chipset: Intel P45 / ICH9R
RAM: 4 GB (2 x 2GB in Dual-Channel) Kingston DDR2-800 PC2-6400 CL5
Motherboard: Asus P5QL Pro
Graphic card: nVidia GeForce GTX 260 896 MB GDDR3
HDD: 500 GB Seagate ST350032AS SATA-2 32 MB cache
Overall result was surprising
Totally near 80% of tests show lower than 5% difference, and only 7% where 32-bit tests show more than 5% slower result. But on 14% cases were results more than 5% better on 64-bit OS. But when we look those 7 tests which have already 64-bit versions,
then 32-bit prog on 32-bit OS vs 64-bit prog on 64-bit OS showed real goodiness of 64-bit.
And when You look around, then You can see as more and more 64-bit progs emerge to market.
And not only high-end stuff but too easy and cheap things, and even games add 64-bit support. So this is our real future - 64-bit will dominate in close future.
So You wanna see numbers yourselves don't You *wink-wink* - there Ya go:
http://lucifer.planet.ee/32vs64-w7.pdf
http://lucifer.planet.ee/3232vs6464.pdf
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