On Sun, Mar 30, 2008 at 8:32 PM, Mike Hansen <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> I definitely don't get the same results as you. Here's my Sage
> session:
>
> sage: import math
> sage: l = lambda x: -3*x^7 - 2*x^3 + 2*math.exp(x^2) +
> x^12*(2*math.exp(2*x) - math.pi*math.sin(x)^((-1) +
> math.pi)*math.cos(x)) + 4*(math.pi^5 + x^5 + 5*math.pi*x^4 +
> 5*x*math.pi^4 + 10*math.pi^2*x^3 + 10*math.pi^3*x^2)*math.exp(123 + x
>
> - x^5 + 2*x^4)
> sage: f = -3*x^7 - 2*x^3 + 2*exp(x^2) + x^12*(2*exp(2*x) -
>
> pi*sin(x)^((-1) + pi)*cos(x)) + 4*(pi^5 + x^5 + 5*pi*x^4 + 5*x*pi^4 +
> 10*pi^2*x^3 + 10*pi^3*x^2)*exp(123 + x - x^5 + 2*x^4)
> sage: ff = f._fast_float_(x)
> sage: l(0.01)
> 3.29059638451369e56
> sage: ff(0.01)
> 3.2905963845136858e+56
> sage: vals = [ i/float(1000.0) for i in range(1001)]
> sage: timeit("for i in vals: l(i)")
> 5 loops, best of 3: 280 ms per loop
> sage: timeit("for i in vals: ff(i)")
> 125 loops, best of 3: 3.47 ms per loop
> sage: timeit('ff(1.0r)')
> 625 loops, best of 3: 6.03 µs per loop
>
> The Python lambda is I get is quite a bit slower than yours, and it
> looks like fast_float is about 50x faster than lambda.
Thanks Mike for your replies.
According to:
http://groups.google.com/group/sage-devel/browse_thread/thread/b7e6f93aeede6c1e/
you are the 6th most active Sage developer. Congratulations. :)
Ondrej
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