返答ありがとうございます。
下の図は私が解析で使用しているプログラムの一部です。あなたの意見を聞いたところ、私はこの計算が時間がかかる原因の１つだと考えています。
私の解析では時間のサンプリング数を増やしたいです。数値で言うと"nsam=2^20"ほどのサンプリング数を扱いたいと考えています。
何かアドバイスがありましたら教えてもらえませんか？
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Thank you for your reply.
The figure below is a part of the program I use for analysis. After hearing your opinion, I think this calculation is one of the reasons why it takes time.
I would like to increase the number of time samples in my analysis. In numerical terms, I would like to handle a sampling number of about "nsam=2^20".
Do you have any advice?
Sometimes, the order in which one carries out calculations or the method used can significantly affect performance. One particular example is that predefining the maximum size of an array can speed up calculations by avoiding the need to increase the memory allocation every time a new item is added to that array. This was the case in Legacy Mathcad (ie, Mathcad 15 and prior) on older PCs. In addition, some operations may benefit from the implicit vectorization of arithmetic operations.
However, while there is an apparent difference in the time taken for each of the four versions shown below, I would not regard it as significant. Still, every little bit helps, and it may be that one of the techniques helps.
All timings are in seconds but should be regarded as an indication of relative performance, not absolute timings.
Stuart
Prime need no time. Only less than 1 second 2^20 finish.
Use if function then you can Time value if you use it in the program or worksheet.
Plot 2^20 data needs 1 or 2 seconds
@ttokoro wrote:
Prime need no time. Only less than 1 second 2^20 finish.
Use if function then you can Time value if you use it in the program or worksheet.
Plot 2^20 data needs 1 or 2 seconds
A good point, Tetsuro. The timings I get for 220 data points average < 0.5 s (10 repetitions for each method shown).
However, such timings depend on the PC's other activities and specifications. In addition, Mathcad starts to slow down markedly when it approaches 4 GiB RAM usage.
My laptop's specs are:
Device name DellPrecision5540
Windows 11 Pro
Processor Intel(R) Core(TM) i7-9850H CPU @ 2.60GHz 2.59 GHz
Installed RAM 32.0 GB (31.7 GB usable)
Stuart
PS. We can now more easily add superscripts and subscripts in the Community using the new superscript and subscript buttons.
