Hey all,

I've written a smath sheet for representing ellipses as a series of n vectors.

however, when i run the sheet it takes around 6-7 seconds to calculate on this computer.

I was wondering if someone could take a look at the code and see if there's something i'm missing that could speed up the calculations. I've attempted changing the code various ways to speed it up, but to no avail.

Much appreciated,

-Pete

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approxEllipse_1.sm (23 KiB) downloaded 51 time(s).

Apply an eval() function to theta, rad1 and rad2 (this speed up the worksheet from 15 s to 3 s on my notebook)


regards,

w3b5urf3r

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approxEllipse_1.sm (23 KiB) downloaded 58 time(s).

thanks a lot man.

so why does eval make the calculations go faster?

Wrote

thanks a lot man.

so why does eval make the calculations go faster?

The eval() function force a local calculation, so all operations made before the eval are "forgotten" in following calculations (in that point remain a division of two numbers).

Another "best practice" it's to select and set all optimizations to numeric; this could take you some appreciable speed advantages.


best regards,

w3b5urf3r

duly noted. Much obliged man.

You're welcome

Wrote

Apply an eval() function to theta, rad1 and rad2 (this speed up the worksheet from 15 s to 3 s on my notebook)
regards,
w3b5urf3r

Additionally apply an eval() function to retMatк
regards,Ber7

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approxEllipse_1M.sm (23 KiB) downloaded 48 time(s).

much obliged ber. It seems to me, that any heavy calculations done inside a function should be done with an eval statement.

when declaring the definition of a variable, eval should be used if its a calculation. like
a:=5*b
should be
a:=eval( 5 * b )

while,

a:=b
should NOT be
a:=eval( b )


By the way, both ber7 and websurfer are tremendous assets to the community. thanks for posting.