comp.lang.idl-pvwave archive: archive » Re: about replicate

Home » Public Forums » archive » Re: about replicate_inplace

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: about replicate_inplace [message #35891 is a reply to message #35890]

Wed, 23 July 2003 10:57

Richard Younger
Messages: 43
Registered: November 2000

Member

Also, there's the /NOZERO keyword to all the array creation routines that
neglects to zero out the data.

T = systime(1)
b = bytarr(nreg, nreg, /NOZERO)
replicate_inplace, b, 1b
print, systime(1) - T, ' seconds, BYTARR/nozero and REPLICATE_INPLACE'

Using /NOZERO seems to speed BYTARR and REPLICATE_INPLACE things up to the
speed of MAKE_ARRAY, but it's still not quite as good as addition.

With nreg=3000,

0.37500000 seconds, BYTARR and [*]
0.35899997 seconds, BYTARR/nozero and [*]
0.14100003 seconds, BYTARR and REPLICATE_INPLACE
0.12500000 seconds, BYTARR/nozero and REPLICATE_INPLACE
0.10899997 seconds, REPLICATE_INPLACE
0.12500000 seconds, MAKE_ARRAY
0.093999982 seconds, onebyte+BYTARR

Best,
Rich

--
Richard Younger
(de-spammed return address)

Report message to a moderator

[Message index]

		Re: about replicate_inplace By: xje4e on Wed, 23 July 2003 11:04
		Re: about replicate_inplace By: Richard Younger on Wed, 23 July 2003 10:57
		Re: about replicate_inplace By: R.G. Stockwell on Tue, 22 July 2003 16:42
		Re: about replicate_inplace By: JD Smith on Tue, 22 July 2003 15:25
		Re: about replicate_inplace By: Mark Hadfield on Tue, 22 July 2003 14:46

Previous Topic:	Re: Leading zeros in Format
Next Topic:	IDL 6.0 is released!

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 06:10:31 PDT 2025

Total time taken to generate the page: 0.00672 seconds