1. append speed
is append() function slow?
is repeat() function much faster?
is this:
for i=1 to 100 do
s=append(s,0)
end for
much slower than this:
s=repeat(100,0)
and how much slower is it?
Anybody has any special set of functions for benchmarking, measuring the
speed of functions?
2. Re: append speed
>is append() function slow?
>is repeat() function much faster?
atom t,t0, total
sequence s, u
total = 1000000
s = {}
t0 = time()
for i=1 to total do
s=append(s,"Hand-crafted from only the finest ASCII.\n")
end for
t = time()-t0
printf(1,"Time: %3.2f\n",{t})
u = {}
u=repeat("Microwave hint: Make hole in turtle's shell first.\n",total)
t=time()-t0
printf(1,"Time: %3.2f\n",{t})
3. Re: append speed
To benchmark a function:
Take a time reading, run the routine a lot of times, say 100,000 times, and
take another time reading.
Subtract the first from the second.
Now change the routine, and run again, then compare the differences.
Pete King.
-----Original Message-----
From: ©koda <tone.skoda at SIOL.NET>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Friday, May 19, 2000 7:29 PM
Subject: append speed
>is append() function slow?
>is repeat() function much faster?
>
>is this:
>
>for i=1 to 100 do
> s=append(s,0)
>end for
>
>much slower than this:
>
>s=repeat(100,0)
>
>and how much slower is it?
>
>Anybody has any special set of functions for benchmarking, measuring the
>speed of functions?
>
4. Re: append speed
- Posted by Dan B Moyer <DANMOYER at PRODIGY.NET>
May 19, 2000
-
Last edited May 20, 2000
Nice, helpful response R.W.D.; however, I think your code needs to reset t0
right after u = {}, & probably should use exactly the same data in each
sequence, too? Looks like repeat is about 10 times faster than append to
fill a sequence.
Dan Moyer
-----Original Message-----
From: R. W. D. <filexfer3 at JUNO.COM>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Friday, May 19, 2000 4:36 PM
Subject: Re: append speed
>>is append() function slow?
>>is repeat() function much faster?
>
>atom t,t0, total
>sequence s, u
>
>total = 1000000
>
>s = {}
>
>t0 = time()
>for i=1 to total do
> s=append(s,"Hand-crafted from only the finest ASCII.\n")
>end for
>t = time()-t0
>printf(1,"Time: %3.2f\n",{t})
>
>u = {}
>u=repeat("Microwave hint: Make hole in turtle's shell first.\n",total)
>t=time()-t0
>printf(1,"Time: %3.2f\n",{t})
