http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model en-us 2026 Maplesoft, A Division of Waterloo Maple Inc. Maplesoft Document System Wed, 10 Jun 2026 11:06:30 GMT Wed, 10 Jun 2026 11:06:30 GMT The latest comments added to the Blog Entry, The Task Programming Model http://www.mapleprimes.com/images/mapleprimeswhite.jpg http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62759 <p>&quot; For Maple the best way to sum over an array would be to use add.&quot;</p> <p>I wouldn't be that sure about that. Anyway, even using add, it can be done faster.</p> <pre> n := 10^8: A := LinearAlgebra:-RandomVector( n, outputoptions=[datatype=integer[8]] ): time[real](add( A[i], i=1..n )); 29.718 time[real](add( i, i=A )); 19.297 </pre> <p>Converting A to `+` is about as fast as that,</p> <pre> time[real](convert(A,`+`)); 19.282 </pre> <p>The following doesn't work in this example,</p> <pre> time[real](`+`(entries(A,nolist))); Error, object too large </pre> <p>but for smaller n it works, and it is faster,</p> <pre> n := 10^7: B := LinearAlgebra:-RandomVector( n, outputoptions=[datatype=integer[8]] ): time[real](add( B[i], i=1..n )); 2.933 time[real](convert(B,`+`)); 1.919 time[real](`+`(entries(B,nolist))); 0.779 </pre> <p>The following is even faster,</p> <pre> time[real](rtable_scanblock(B,[],Sum)); 0.483 </pre> <p>and it works in the original example as well,</p> <pre>time[real](rtable_scanblock(A,[],Sum)); 4.820 </pre> <p>The following also doesn't work in the original example,</p> <pre>time[real](trunc(Statistics:-Mean(A)*10^8)); Error, (in Statistics:-Mean) not enough memory to allocate rtable</pre> <p>but in the smaller example where it works, it is faster,</p> <pre>time[real](trunc(Statistics:-Mean(B)*10^7)); 0.124 </pre> <p>Alec</p> The latest comments added to the Blog Entry, The Task Programming Model 62759 Sat, 17 Oct 2009 07:22:08 Z alec alec http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62760 <p>I find this same 10^8 limit in 32-bits Maple. Shouldn't it be higher in 64-bits?</p> The latest comments added to the Blog Entry, The Task Programming Model 62760 Sat, 17 Oct 2009 11:10:53 Z jakubi jakubi http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62761 <p>Yes, I did these measurements in 32-bit Maple - in Classic Maple interface in Windows. 64-bit Maple doesn't have Classic interface, so I use it quite rarely (if at all.)</p> <p>Out of curiosity, I've just repeated them in 64-bit Maple 12 in Linux (Ubuntu 9.04).</p> <pre> n := 10^8: A := LinearAlgebra:-RandomVector( n, outputoptions=[datatype=integer[8]] ): time[real](add( A[i], i=1..n )); 24.198 time[real](add( i, i=A )); 22.308 time[real](convert(A,`+`)); 17.513 time[real](`+`(entries(A,nolist))); </pre> <p>Waited for a few minutes - it didn't stop, so I interrupted the calculation, but Maple stayed frozen and I couldn't do anything in it, so I closed it and then started it again.</p> <pre> time[real](rtable_scanblock(A,[],Sum)); 6.353 time[real](trunc(Statistics:-Mean(A)*10^8)); 7.837 </pre> <p>Doing that second time gave</p> <pre> time[real](rtable_scanblock(A,[],Sum)); 5.934 time[real](trunc(Statistics:-Mean(A)*10^8)); 74.394 </pre> <p>But for n=10^7 the order of results is about the same as in Windows, just about 3 - 5 times slower for procedures using external calling - obviously, Windows dll used by Maple are faster than Linux so.</p> <p>That, by the way, confirms other evidence that Linux development has stalled last year or two. While Windows 7 is a significant step ahead, latest Linux upgrades, either kernel or desktop, are just minor improvements and bug fixing. A lot of not only new, but also 2 or 3 years old hardware, especially networking, doesn't work in Linux. It seems as if the Linux developers finally realized that they can't compete with Windows.</p> <p><b>Conclusion: </b>32-bit Classic Maple in Windows is much better than 64-bit Standard Maple in Linux.</p> <p>Alec</p> The latest comments added to the Blog Entry, The Task Programming Model 62761 Sun, 18 Oct 2009 03:21:59 Z alec alec http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62762 <p>By other evidence, you mean comparative reviews of Linux vs Windows on 64 bits/multiprocessor platforms? If so, do you have some pointers?</p> The latest comments added to the Blog Entry, The Task Programming Model 62762 Sun, 18 Oct 2009 04:22:54 Z jakubi jakubi http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62763 <p>It was just my personal observation. The way I use Windows and Linux may be far from the most typical, so other people may have different opinions.</p> <p>Same with reviews - it's not that easy to find a reviewer having similar experience (and weights) as you or me.</p> <p>In this particular example, comparing speed of the same commands in Maple in Windows and Linux, on the same computer, the advantage of using Windows and Classic Maple is rather clear.</p> <p>Alec</p> The latest comments added to the Blog Entry, The Task Programming Model 62763 Sun, 18 Oct 2009 05:02:24 Z alec alec http://www.mapleprimes.com/maplesoftblog/36578-The-Task-Programming-Model?ref=Feed:MaplePrimes:The Task Programming Model:Comments#comment62764 <p>Now, compare that with adding array elements in Python (I used the IPython(x,y) console from the <a href="http://www.pythonxy.com/foreword.php">Python(x,y)</a> distribution for Windows),</p> <pre> In [9]: a=randint(-100,100,10**8) In [10]: time add.reduce(a) CPU times: user 0.29 s, sys: 0.00 s, total: 0.29 s Wall time: 0.28 s Out[11]: -51005647 </pre> <p>Alec</p> The latest comments added to the Blog Entry, The Task Programming Model 62764 Sun, 18 Oct 2009 08:03:30 Z alec alec