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Re: Very (very very) slow typing for Mathematica in large cells.

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  • Subject: [mg119215] Re: Very (very very) slow typing for Mathematica in large cells.
  • From: BernieTheJet <berniethejet at gmail.com>
  • Date: Wed, 25 May 2011 05:56:56 -0400 (EDT)
  • References: <iraq3s$loh$1@smc.vnet.net> <irdck9$3l7$1@smc.vnet.net> <irfvhh$bu7$1@smc.vnet.net>

Peter, this is a good idea with the Expand, and I tried it and I also
see no slow downs.  So I expect that it has to do with nesting of
functions, so I try:

Fold[If[r > 1/2, Plus[#1, #2], Divide[#1, #2]] &, x, Range[11]]

which I then convert into a function:

f[x_,r_]:=...

This, then, has quite a few levels:

Depth[f[x,r]] -> 25

Here I definitely can observe the editing lag, although still not as
egregious as with my other work.

B


On May 24, 5:59 am, Peter Pein <pet... at dordos.net> wrote:
> Am 23.05.2011 12:24, schrieb Istv=E1n Zachar:> Dear Bernie,
>
> > the same performance drop is present under Win7 (64bit, Mathematica
> > 8.0.1).
>
> not necessarily...
> I've made a large output cell with "Expand[(1+x)^100] and entered "a+17
> -mc^2" and every keystroke had an immediate effect.
>
> This is Win7 HomePremium Sp1 64 Bit and Mathematica from February 2011
> (8.0.1)
>
> I tried it with Expand[(1+x)^1000] and got the same effect.
>





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