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Pastimes : Dream Machine ( Build your own PC ) -- Ignore unavailable to you. Want to Upgrade?

To: Spots who wrote (2139)	8/24/1998 11:59:00 PM
From: Zeuspaul	Read Replies (4) \| Respond to of 14778

The DOS / PII slowness issue I created four of benchmarks to try and get a handle on the problem. The Contour benchmark This command interpolates along a vector in the TIN model and then draws contour lines at even intervals. The operation is mathematically intensive. The data set is 20000 xyz data points. The total difference in elevation is 20 ft and the contour interval is 0.1 ft. The Pan/ZOOM benchmark This is a macro that pans and zooms twenty times. It is basically a redraw of the screen in different positions. The program would have to search the database to find data to display and then redraw the screen. The dataset is 20000 xyz points and the very detailed contour map. The 3D mode orientation function benchmark The program leaves the plan view mode and shows a box. The box is used to orient the 3D view. One pushes and holds an arrow key to rotate the box. The page up key exaggerates the box. The time represents three complete rotations of the orientation box while holding down the arrow key. The 3D view benchmark Once the box has been orientated the 3D view is created. This is an interpolation/representation of the TIN model. The time represents 10 creations of the 3D view. ________________________________________________________________ There are three test machines. PII 333 384 MB RAM Matrox MII video card DOS 7 via Win95 Pentium 133 32 MB RAM unk video card DOS 5 Pentium 66 (Micro Channel) 64 MB RAM ATI Ultra video card and second unk video card in dual video setup DOS 5 _______________________________________________________________ Results All tests results are seconds to complete task. Lower scores are better as the task is completed faster. PII 333 P 166 P 66 _____________________________________ Contour 12 40 44 Pan/ZOOM 34 113 210 Orientation 54 19 19 3D View 14 34 72 _____________________________________________________________ My interpretation It seems like the PII is significantly faster with the one exception. The orientation benchmark is by far the simplest task. The program is dealing with less than a dozen objects. The other benchmarks are dealing with 20000 + objects. My guess is a timing issue with the keyboard. The three other benchmarks do not require keyboard input once the task has begun. The orientation benchmark requires continuous keyboard input as the arrow key is held down. The program is extended DOS. Memory management is not user configured with one exception. One allocates an object count which divides memory between total allowable objects and memory available for operations. Zeuspaul